New engine has loss of compression

I had a concern that for a novice,, getting the knack of the right drill speed and the in/out motion to achieve the proper crosshatch may over-do a coupla bores while you learned..

But with a very fine ball hone,, or Moper's method,, I can't see you doing much harm..

Having said that,, I have had a few moly ringsets fail to seat because of too course of grit..

Thats why I suggested the shop do it,, but heck,.. everyones gotta learn

cheers