I use a plastic soft drink bottle. Put a piece of double sided tape on the cap and attach the body to it. I put some sand or gravel in the bottom of the bottle to aid in stability. I had a pic on the forum here but can't find it.
Great work! I've got one that's about 90% done with the exception of the floor pan and it's attached parts. It was warped and I managed to break it. I'll try again sometime to finish it and hope it comes out as nice as yours.
Great job! This model was the first one I finished when I returned to the hobby. It's an easy build and one that I recommend for beginners or as a confidence booster, if needed. At the time I finished mine, I needed a boost after a few failures.
I believe that the sanding cloths contain silicone. As Bill said, that will cause fisheyes. Follow his recommendation and WASH THOROUGHLY! I always use Dawn. Get the blue stuff with no moisturizers in it.