BORG 55FL F3.6 with Rotator
The customer who recently bought 55FL F3.6 feather touch version wanted to orient a cooled camera without interfering a motor and tension screw with a plate. So he brought his scope to my office this morning and we tested around several possibilities. Here is his final conclusion.
This setup allows him to rotate a camera up to about 270 degree without a motor’s interference. A rotator is functional to raise the scope up. And a plate is short enough for large CCD camera too.
I was glad to figure out the good solution for him too. Shorter the telescopes, harder the setup.
DigiBorg 
This is an interesting setup.
I should give this a try.
Donghun,
Yes, you have completely all parts already. So you can do like that.
Only one thing you should notice.
two rings are very close each other. So the knob is too large. Please use an original screw and 1/4″-20 bolt for 2nd mounting ring.
Ok thank you for letting me know Ted.