Jucava, I'm not raging on bipes. I fly a pitts every week among other thinks like my 1/4 scale extra. I've had a bipe of one kind or another in my possession every day for the last 30 years. Of coarse you don't buy a bipe to glide around. My point was, it's going to have a very different sink rate than a trainer and because of this, in say, a dead stick, someone with low time could find themselves in over there heads rapidly. Hate to see it happen to anyone.