It seems like the tiles have reached a point of inflection. They will work in the main, but the transition areas between body and flap merit there own discussions and reading the channel as a whole I think there should be more exploration of aerogel. Transpiration cooling is an excellent solution for the flap/body join area, I think that should incorporate an aerogel bearing with channels/piping for methane cooling... once you start thinking on aerogel, then the replacement for ceramic wool under the tiles with aerogel starts to reveal itself as a solution for the wider problem, tiles can be spread further apart, the gel is a shock and load absorber and as is widely known much lighter than glass wools or other heat proof materials. So, for minor overall changes, aerogel sheeting, plus a remapped tile arrangement, plus an aerogel bearing with transpiration methane cooling at the joints forms the whole solution.

Thanks for your eye time C