CCM's grip frame is comfortable, but it's also one of those personal preference things. If you like it enough to switch, go for it.
I've never run a VSC with macro, though I suppose it would make it a little easier to take the gun completely apart. I've certainly never had any problems with a CCI hardline.
Phantom detent rings are made by CCI, though they can be picked up from a number of places. Factory direct, Wevo, White Wolf Airsmithing, and Doropaintball all stock them regularly.
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