My springs showed up as well and look great. I hope to put together an MT09R with them this week if I can find the time. I just started some new work, so not sure when that time will be available.
The taped envelope was intact. The springs look good. I haven’t had a chance to do anything with them, yet.
For my most practical and frequently used lights, I plan to replace many of my spring bypasses with these springs, either singly, or nested. For my highest output hotrods, I’ll probably continue using spring bypasses.
I got my MT09R built yesterday when my internet was down.
Overall the new springs are working quite well and are way easier to work with then the bypasses if you have a hot air gun.
Using these springs vs the bypassed spring carrier on the same light showed around a 10% difference in output on average.
The main spring for the driver has to carry the full ~40A of current so it sees a bit more of a drop when that spring is not bypassed but still quite good. For production lights these style springs should work great, 90% of the performance and way way more reliable. I don’t see me doing a lot of bypasses from now on, that extra few percent is just not worth it in most cases IMHO.
The spring tension is also great, although in the MT09R they are taller then the stock springs so getting the tailcap on is a little harder but not a big deal.
Very happy with my order and already thinking I should of ordered twice as many.
They shrink a bit after the first few full compressions so even though they may look big once you realize that it may not be as big of difference as it seems.
Yeah. The small ones do more plastic deformation than the large ones since their wire gauge/diameter ratio is higher, meaning they are stiffer, and require more force to compress to the same height, meaning a higher potential for plastic deformation.
The large ones have no problem with deformation though. I produced them at 13mm since I knew it was going to deform at first compression, and testing them revealed I was right to go from 12mm to 13mm, as the spring lost about 1,0mm.
They did not lose any more height after that, even after 20 full compressions.
TLDR: Big spring is better than small spring in terms of mechanical strength.
Regardless, like hank@ Emisar mentioned in a thread about his the deformation happens once and then it’s pretty well set. It’s fine since both springs were designed knowing it would happen.