Pulsar, you are just shorting it. You need to desolder one of the wires to the LED and then wire the DMM in series with the LED.
so just to make sure i got this… id want to desolder the negative from the star and take my readings from the neg pad to the neg return wire?
Yep.
any thing else to say to the questions in the first two posts? 
pretty sure im just going to go with the crelant battery tube unless i can find a cheap host with good threads… but im not sure about the best emitter with the optics ill be using, or dedoming with aspherics…
The XR-E is still the best for aspherics, not the quite the highest surface brightness but it does have a narrower emittance angle. The focal point will not change depending on LED (i don't think so) and de-doming will increase throw.
nice. actually have an xre on a star thats not in anything right now. im not worried about max lumens with this, im looking for max throw. and i wasnt sure if any of the newer emitters knocked the xre out yet.
How do you know, that the crelant collimator will fit to this light, and the focal point will be good? That's a lottery.
I'm just set the driver current to 1.4-1.5A and put a dedomed emitter in the light, and I'm happy with the 88kcd now. Eventually a same size asperical throws better than a reflector, but you loose a lot of flood lights. And it requires much more work and time ...
here are some spot beamshots I hope you can choose, which is the best for you:
1/1600, iso100, f2.8
t13 with modded driver 1.4A tailcap current , with a dedomed T6 xm-l, 88kcd
it is not so greenish in reality, the wallpaper is green, and the camera white balance is crap
t13 with orig driver 1ampere tc current, 36Kcd
t13 with modded driver 1.4A tc current, 44kcd
xr-e R2 at 1.2A + 66mm aspherical, 120kcd
xm-l T6 at 3A+ 66mm aspherical, 70-80kcd
dedomed xm-l T6 at 3A+ 66mm aspherical, 130-140kcd
There’s a thread on here that says it fits and works fine. If it needs to be tweaked a little I’m sure it will get it figured out. Pretty sure I’m going to go with an xre for it. The square hotspot don’t bother me, and I’m trying to get as much throw as possible
Doesn’t specify that it is perfectly focused, but yes yes it works just fine.
Ahh, okay, I think you should try a dedomed xm-l with the crelant aspherical.
Or with a xm-l2? Unfortunately I have no experience with it yet.
I was debating an xml2 dedomed, but I’m not sure if its possible…? If it is I may do that.
just an update:
got some funds and tomorrow i will be ordering a 7g2cs battery tube, tail cap, and a 7g5cs collimator head. all they had was gray battery tubes, so the hole host will be gray, with just the center driver/emitter/switch housing being black. hope it looks ok.
not sure if im crazy or not… but the hole lot will be $50 shipped for new parts. twice what i spent on the zy-t13 :money_mouth_face: but its what i want, and i cant find another battery tube to fit it
havent got around to doing the driver mod yet. the hot spot with it is much more intense than my c108 with nanj 2.8a driver in it, so i want to check amps at the emitter still before i change anything. been reading up on dedome xml, and it seems like its a little more involved than i originally thought also
edit: and now after thinking about it for 5 more mins after thinking about it for 2 days, i may just get a black collimator head and wait til i can find a black, or even stainless tube that will fit…
ok, i bought the collimator head a few mins ago from madecov at md-lightsource.com. decided to hold off on the battery tube until i can get a black one
so anyone curious, ill know soon if the focal point is good on the zy-t13.
was a hard one to pull the trigger… just bought the ea4, and want a BLF a8… but i got to stop my putting projects on hold S)
so i got my collimator head in today. two problems, one not as bad as the other.
one, it is not quite in focus, you need to back it off about an 1/8” inch or so, maybe less. could be easily fixed with a spacer
leave it at that for now
Just go my second one in the mail today!! It seems to have more of a yellow tint to it for whatever reason and the hot spot is not a defined!! Oh well it still DAMN bright!! Now you got me wanting to make a shorty out of it!! Lol
So what’s the other problem? 
What are your impressions of the collimator head on the ZY-T13? Does it live up to expectations?
The aspheric lens is loaded with pits. I read on here that some of the Chinese lenses are hit or miss on quality, but I was expecting more from crelant. Didn’t get to play with it much because my fiance just had surgery yesterday and I’ve been right out straight with the kids and getting the house in order and all after getting home from work.
Man, thats some bad news. Shame on Crelant. I never would have expected that.
I hope your fiance gets better real soon. Good luck to you both.
yeah me either. the head itself looked great… until i looked into that big ol aspheric lens… then excitement got lost pretty quick.
it was a fairly minor surgery, she got her tubes tied. but she cant bend over and pick stuff up and has problems with sitting/standing up. and the pain killers has been making her puke and cant eat even though shes only taking half of what they prescribed
Another member here mentioned how the DX lens is actually better quality than the one that came with the collimator head. I guess it’s not an isolated occurrence. That’s a shame.
A lot of old projection screen TV’s have large expensive useful optics. You can often find the TV’s broken and free on craigslist if youre willing to haul away the entire TV.
Here’s an interesting thread.