I have a Bestop Supertop with the Sunrider feature. It's always annoyed me that when I flip it open, the fabric falls behind the crossbar and intrudes into the cabin:
I fixed it by making a strap out of nylon webbing, and a few tiny bits from the 3d printer (STLs attached):
1. A reinforcement plate for the ends of the strap where the snaps go (print 2)
2. One of those strap things that cinch a strap tight
Other things needed:
1. 54" of 2" wide nylon webbing
2. Snaps and snap tool (Though Velcro would probably work too
Assembly:
1. Put double side tape on each side of reinforcement plate
2. Take a reinforcement plate, line it up with an end, wrap around plate 3 times, install snaps where the holes are in the reinforcement plate
3. Repeat on the other end
4. Feed around the rollbar
5. Install the cinch clip
6. Wrap around the front crossbar and snap together
7. Push the cinch clip towards the rollbar
Results:
Works pretty well, not bad for using stuff laying around. I got plenty of extra material to make a few of these if anyone would be interested.