So I recently put new seals in my girls blaster. I went to put the flywheel back on and once the nut got tight it wouldn't move the flywheel in and stripped a part of the crank threads. I bought a m12x1.25 die since my die set didn't have that size and used the die. Same thing happened... The nut goes on but feels loose (like it's a size too small or something). I took the same nut off of my blaster and the same thing happened. Not sure what's going on, I just rebuilt this thing a few months ago and the nut went on fine when I put the motor together originally. Can I use my set and take the crank threads down a size and get the appropriate size nut? If so, what's the next size down?