Hello Hoss,
My Apologies, I have been flying for about the same, My Typhoon was heavy, more than you are talking about with the 51, I only had a 30 in it, badly needed a 35 or even a 50, had to watch it if I got a bit slow, My 85" Corsair is over 15kg, but it is beautiful to fly, weight doesnt seem to worry it.
cheers, Oldtimer