I fixed the tip rib and drilled and cleco'd the leading edge skin to the spar.

Before riveting it is recommended that you prime the metal wherever two parts will touch. The thinking is that there is a small danger of corrosion at the joins where substances could possibly get between the two surfaces. I toyed with the idea of painting everything but that was a lot of work so...
Two weeks in England and now one week at work mean there has been no physical progress on the plane but I did buy some work supplies and, more importantly, I bought the drawings and manuals making me an official builder. Oh, and the maximum weight of the plane has increased.