Re: McMillan Cheek Rest?
The integral rest is mounted with the block and a pedestal, and the pedestal's screw holes are transverse slots, allowing about 1/4 to 3/8 of an inch worth of lateral adjustment for the block. The saddle system has no such lateral adjustment. I think it makes a valid argument in favor of the integral system, but some may also find it's not needed.
Also, I find that thumbscrew adjustment locks tend to slip. The two vertical rods supporting the integral system ride in corresponding vertical holes. I find that I can place spacers under those rods, and slippage is history. Since I have to move the block anyway, to remove the bolt, there's no issue for me about adding and removing those spacers. My base is a tall one (Ken Farrel 20MOA), and I find that a pair of 52SMK .224" projos make the perfect spacers.
Greg