Oh, I'm aware the RB67 is heavier, but I'm not overly worried. Like I've said before, I'm a big guy, with pretty big hands. I find so many camears just feel so fragile to me. Something with some decent weight will likely be a refreshing change
LoL, I've actually already been kind of reading up on LF, mostly out of curiousity. The cameras just seem so huge for getting out and about with. Would be great for studio work though (if I ever get myself a studio lol). When I get to that stage though, I think I'll likely try making one. I'm one of those people that loves building things, and it looks like LF camera building isn't all that difficult.
The RZ and RB67s aren't much if any lighter then many field 4x5s.