I'm planning to rendezvous with the Saturday morning CRW ride. Roundtrip for me is 50-55 miles and about 25-30 are with the CRW group. It's a B version of the Tuesday night ride, it uses a lot of the same roads, it's still a hammerfest but not quite as ruthless. Holliston is a great jumping on spot (Len???), or you can drive to my house and ride over w/ me, or I suspect from Westboro it also ends up being 55 miles total with close to 30 miles with the group. If you're interested I can post a map of my route and highlight a good meeting location.
I'll be leaving Franklin at 8 or slightly before.