Another kind of caution:
My first experience with 1/4A models was when Cox first brought out their PeeWee .020 in the 50's. Having no information on their power, I proceeded to build a small C/L plane with a 12" sheet wing and a simple box fuselage. Had to cut down a wooden 1/2A prop since the props for the PeeWee had not yet reached our LHS. Put on some five foot or so dacron lines and launched with my right hand while controlling (relative term) with my left.
It spun me so fast I couldn't keep up (surprising
). The lines wrapped around me and the plane "crashed" into my leg. The next plane the .020 was on was a bit larger and the lines were definitely longer.
George