we have flown the senior tele with 3 different gasoline engines- -the spe26, the crrc 26, and a zen 20ei. they weighed in at about 11 1/2 pounds. all flew very well and "telemasterish" even at our 6002' field elevation. we have had a blast with all of them, particularly crosswind touch and goes. also flown with floats from snow last winter

my personal favorite is the zen 20ei. hope this helps...

meathook