Jim, that is another plane I considered, in fact, I had been considering that one before I decided on the LT-40, but not for floats. Yes, I like the idea of ailerons and flaps as I built a Seniorita with flaps. The only downside to the Senior is that it takes a lot of film covering, unless you use Koverall or similar covering, but then you gotta dope the covering which is quite odorous. The LT-40 is a smaller plane but quicker build and already has ailerons. The Senior is not that much larger than the LT-40 as far as wingspan goes and the flying weight is pretty much the same with the wing loading of the Senior being an estimated 12 oz./sq.ft while the LT-40 has a wing loading of 14 to 15.5 oz./sq.ft. The Senior has a bit more wing area + 27% . All in all it would be a toss up as to which one I would choose. The Senior would definitely look more majestic floating around the sky.
I guess it will all come down to which I can get first.
cheers