Thanks guys,
JPV, I most certainly will, and please, when you solve it, tell me how you did it so I can learn. I have the most trouble with SU when doing contours.
Here are the roller door prints. I realized when going to sleep last night that I didn't hollow them out and was wasting a lot of $$$ resin. I just re-drew it to rectify this and am printing the 3rd one now. Some of the itty-bitsy details like the chain drive and sprockets didn't form really well. I've also modified the drawing to get this better. It doesn't matter, but I'm using each iteration as a learning point.