About 4.0 hours spent today were actually on physical assembly. A large amount of time was spent clarifying what I believe to be the proper order to rivet and assemble elevator and trim tab assembly together, the text manual doesn't mention riveting before attaching the trim tab to elevator but assembly pics online seem to confirm that the top skin of the elevator is indeed riveted first. Only one side of both the forward and aft spars are pre drilled to ensure you can assemble a straight, flat elevator. Everything clecoed together and trueness confirmed before drilling those. Actual assembly of elevator frame and skins was productive.