barrel shims, whatever you want to call them.... these are used to obtain desired deck height. i thought there would be alot more options out there since this step has been emphasized as very important. i found some available in .010", .020", .030".... but of course, in my first measurement, i would need .025" on one of the cylinders so just a couple of questions:
what are your sources of cylinder spacers?
can you stack cylinder spacers? (i don't see why not, just want an expert to confirm)