I don't think the engines sold well since there was a fire sale with a sharp price reduction at the end. I have one of the engines. The RCS 44 runs well, runs very smooth and puts out about average power for its displacement. My engine turned a 20 x 8 wide bladed prop at 6500-6700 rpms. This engine has less power than the ZDZ-40 and weights more but runs smoother. I really don't have a application for my engine, so if you are looking for one, email me and perhaps we can swing a deal.

Elson