i have found 2 sizes of bosses. i need
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2015/07/full-9141-22884-dscf4775.jpg)
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2015/07/full-9141-22885-dscf4807.jpg)
the pulley on the left is from a 550 so i believe the boss in the middle fits into the pully but the shaft size is larger than any other full crank i have. found a fella the other day that said he would machine one for me. i presume i cannot get one from anywhere?
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2015/07/full-9141-22886-dscf4765.jpg)
Question. do i have to use any particular type of steel?
cheers
