Yep! Cool Blocks are Cool! Instructions for the smaller 1/8" and 1/16" blades call for closing the blocks onto the blades and letting the set in the blades to cut a groove in the blocks. Also since these blocks are supposed to lubricate the blades - why not use the snug fit for all blades.
The only problem I have had (and it's not really an issue) is after using a small blade to turn sharp corners for a while - the blocks wear (saw) out in the center and cannot hold the blade firm any longer. Just have a spare set of blocks and keep them squared. I sand them to flatten the end surfaces.
Octogenarian's have an earned right to be a curmudgeon.
Chuck in Lancaster, CA
My (new to me) bandsaw cuts were really raggidy, neighbor came over and says no wonder the blade you are using looks likd a resaw blade, well yesterday I put in a 1/4 6tpi and pulled the blocks, 1: they were set too far apart 2: they were well worn Put them to my belt sander (standalone) and squared them up then as per this forum suggestions put them close to the blade..... what a difference