I began with a Manfrotto Magic Arm attached to a zero gravity chair. I would not recommend it at all, since the product is made to hold a lens steady in a fixed position, and we generally require movement across the sky.
Next was a P-gram mount. An improvement over the Magic Arm, but still more futzing than I wanted to do. Having extra degrees of freedom in a mount can be a blessing and a curse.
I ended up building a mini-dob mount with the lens looking down to a fixed flat. The journey started with a moving mirror, but the size requirements were prohibitive for good sky coverage. Also, did not like the performance of float glass with changing temperatures, or my largest lens (a 300mm delivering 11x). So I switched to the 45 degree fixed flat and the mount is based on the old Richard Berry design. Very simple.
The fixed mirror design took a few iterations, but I am happy with the end results. Extremely ergonomic and easy to use. Built from scrap Baltic Birch laying around the shop. Main expenses were the DSC kit and of course the 8" flat, which I got for $300. It is scratched and it was a little upsetting to see when I received the mirror, but it does not matter for low magnification. If you go with this approach, I highly recommend the DSC's since the view is mirror-reversed and angled at 90 degrees. The alternative would be a red/green laser pointer combo (which would allow for filter use on the NVD).