I went with something home built similiar to Jimmbbo's but a bit more elaborate.

One piece of 1/4" wood was used to build the whole thing.

I drop the test bench into a Black and Decker shop mate. THe Shop Mate clamps a piece of wood which hangs from the main board of the bench.

The motor mount is elevated on a crude wood square that has a tank mount aside it.

A pushrod attached to a simple handle acts as a throttle.

It took about 20 minutes to build with epoxy and drywall screws.

Works great, less filling.