I couldn’t resist and ordered as well, based on this thread saying they fit the Convoy S6 host:
All convoy S series have same threads. Simon sais that short tube wont fit only because different length of tube over threads (18350 tubes were made for S2+ so they fit S2+ and probably S3).
Btw, BG was kind enough to refund the difference that I paid before it went on sale.
Nice light-throwing baton! })
Now go blow some backs, LOL! 
Cheers ^:)
Hat tip to t18, at: Semi groupbuy Jaxman X1 host - #29 by T18
Jaxman X1 and Convoy L2 half tube extension lego (9 pictures somehow presented page-by-page in a single window in a single response, lovely)
Here you go…. S2+ with EE XR2
The plot thickens on this one.
I have a blue tube sold by Banggood (US warehouse) for the S2+ and it fits and works perfectly on the X2R and the S2+.
I have a second blue tube, also sold by Banggood (CN warehouse) for the S2+ that also works on the S2+ but does not even thread into the X2R.
I have a black S2+ tube directly from Simon, it also does not thread into the X2R.
I now also have a black tube sold by Banggood (CN) as “Eagle eyes 18350” linked earlier in this thread. It threads into the X2R perfectly but does not work correctly. I believe one end is not long enough to reach the contact shelf in the head. Also, the threads on this one are very very shallow, as in the ridges themselves are about half the height of those on the Convoy tubes.
Mine arrived yesterday, I had ordered two of these (maybe I ordered the wrong one?) but neither of them match the threads on any of my Convoy tube lights. Also, even though they are both supposed to be the same SKU, they don’t match. The threads are the same, but the machining is slightly different, and the finishes are much different between the two. One is a nice matte finish while the other has a shiny sheen to the anodizing. Kind of like buying two different 501b hosts from two different vendors…
:weary: :weary: :weary:
weird that there is so much variation. Still having issues since the A6 mix ups I guess.
I’ve sent EagleEye a message asking them to make an official one for their products. * fingers crossed *
Yep. As I noted at the beginning of this thread, we here can’t make a general, sweeping, “this fits that” promise to anyone else about budget parts
Because: much variation from one part to the next, even within the same product/brand. Some parts just won’t match up for some of us.
Do we feel lucky? Do we?
All this thread can promise is first hand “I have this and it fits that” information to suggest what MIGHT work for someone else.
Thanks to pilotdog68 for taking a poke at making things better (or, in this case, getting EagleEye to make things better)
I bought convoy 18350 tube to try on my EE XR2. The front fits but the tail switch part will not screw all the way on…. oh well!
Lumintop Tool … the head swaps with the Lumintop LYP365 head to make your black aluminum tool a 219B …hi-cri Nichia
At a minimum, the latest VG10 tailcap legos with the ThruNite TC12 V2. The tailcap innards swap between the caps too. Will check for other swappable parts and post some pics.
The Thorfire C8s tail cap legos with the Convoy C8, and the knurling even matches.
Jaxman E2L and Convoy S2/S2+ threads match nicely.
ThruNite TN11 tailcap fits a Convoy C8.
Indeed 
:
The Defiant Super Thrower, and the C2V3 26650 torch body, (both now very difficult to find) to make a 18650 or 26650 DST.
After buying a couple S41S heads in the 3/30 AliExpress sale, I thought I would try out some legoing. The Ultrafire and some generic 501's and 502's fit and work. I didn't realize until after uploading the pic that the middle one below was not all the way screwed on. Tail cap just about touches the knurling and head has a slight gap.
OdePro TM30 "legos" with Astrolux S1