I had only few hours for modeling this weekend and spent them preparing engine parts. Started couple of parts from gearbox as well. It's all held up by gravity only, so I couldn't move it from my work table. Fit of parts is pretty good. MFH cleverly designed many pins and tabs to help align parts and held them together. Final assembly shouldn't be an issue. Not too many parts are left to prepare before all could go into tumbler for cleanup. But severe lack of modeling time slows progress down.