Are you talking about the 9mm ROC or the 45 ROC?I am really just trying to figure out what the options are. So far it looks like you have these options:
Flush fit 6rders - comes with two. Metalform?
Flush Fit 8rders - Mecgar
WC 8rders - flush fit or stick out a bit?
WC combat 10rders with base plate for over insertion, which my guess is are a regular govt size with a different base plate
Standard govt size 10rders - Dawson, Metalform, Tripp. With a slightly modified baseplate. I assume you are talking about something like this: http://www.trippresearch.com/store/store_1911.html
My daily carry is a LW Operator. I have a flush fit 7rd in the gun and carry a spare 10rd CMC and 8rd WC ETM. My thought with the Roc was, since it is for lower profile carry, a flush fit in the gun and one spare 10rder.
I guess while I am asking, I have no experience with slimline grips, but my understanding is that to use regular width grips I am going to have to change out the grip bushings. Is that correct?