I wasn't sure either so I just tried a Zev gen 3 adaptor, recoil rod, and 14 pound spring from my 35. The 41 didn't really want to go into battery with this spring.
I tried a Jager rod and 14 pound Wollf spring too, and that didn't help, so, I guess I can't use the 14 pound springs that I use in my 17, 34, and 35. Oh well.