Not picking on ya but,,,,,,,,,,,,,, You are one to over tighten bolts, they just don't break off all by themselves.
If the bolts were not the correct length you could have called them and had more shipped, or gone down to the local auto parts store, etc and purchased a few if you were in a hurry, then ask for reimbursement. I can't remember what bolts I used with the new reed block I received, there were two different sized reed blocks used on the original engines. I have both.
Again now, why did you need to grind 3/16th off of the reed and reed block...................