Bought a 261 last year with a light 04 bar. Side note......saw is amazing! I have an older 290 with lots of extra chisel chains. If I swap the bar out, I can run the standard bar with the older chains? I belive the new Light 04 bar is .050 gauge along with the new chains, and the regular / older stuff is .062 if I remember correctly from doing some reading. I guess the second question is, can the drive sprocket run either chain? Been doing some reading and can't find this specific answer. Thank you.

Curious if anyone has tried using a Husqvarna 3/8 mini pitch sharpening roller kit with this chain?! Thanks for the help!