Their company president Dennis Wood is on their forums 24/7 answering questions and proudly announcing their newest products. I've have a great experience with them
anyways, they make a great rail mount system as well with an adjustable riser baseplate called the "proteus system"
Jstunzi: I'd be using this glass primarily in a DIY vibrating adapter but also for macro photography. The Cinevate retails for $250 and the Redrock retails for $400. That would lead me to believe the Redrock is better, but that might not be the case...