I have the RJ070s and love them.
I only installed them a couple months ago, but they are quite and I haven't had any issues yet. Easy install with everything you need in the box, it was great.
I have a 8'x9' door with long radius turns and angled runners to match the scissor trusses.
I haven't...
All of that sounds good, Thats what I will be doing in NY...
But ask a local concrete company for a quote and see what they plan to do.
This is a good free way of getting the way it should be done from a professional