I'm getting closer, I glued the firewall today.

The engines in the picture are my new SC FS30AR and an old OS 25LA. The 25LA is my first engine, from 1998. It has survived several airplanes (I can think of four at the moment). It was very dirty on the outside, but the inside was shiny and compression is very good. I replaced the piston and liner a few years ago, and it probably hasn't been run very much since then. So i decided to clean the outside of it and put it to use again. The big question now is which one to use on the Butterfly. Time will show.

The second picture is a weather report, showing that indoor activities are preferred.