RE: Groovy 50 or venus 40?
I had the Venus 40 (had because I destroyed it on take-off one morning. Very windy day, take off, suddenly veered to the right with a gust of wind, I corrected but brain had me use the aileron instead of rudder... plane went up about three feet while rolling inverted then smashed into the ground).
I loved that plane. It was an easy build, flew it with the OS 50 SX engine, and it was very nice, easy to fly, and a great primer for pattern. I was able to do all the Sportsman routine with no problem.
Instead of buying another, I built the Venus II and love that plane even more. OS 1.20 AX on the Venus II. Great power.
DS