How I did it ........ .......I did that sort of practicing when I was starting out in Control Line at 15 years of age. (it was 1955). but I was swinging a small C/L plane on 10 or 12 foot lines. Instead of an engine on the frront, I attached a small stone appropriate weight. I could practice level flight, inside loops, outside loops, wingovers inverted flight and or course landings. I spent hours flying this little plane and as a result, in the 60 years + that I have built and flown C/L, I have never, I repeat, NEVER crashed a plane due to control input mistake or confusion as to what control to use in any given situation. Planes flown .....Veco Smoothie, Nobler, Ares, Veco Thunderbird I, Barnstormer, All American, Sr., Trixter B-C, Ringmaster, Flying Clown, Goldberg Buster, Sassy Saucer, Sterling Yak-9, PDQ Super Clown, Flite Streak, Half Fast, Reactor, Combat Cat, VooDoo, Wooten Vampire, Nemesis II, Winder, Wooten Sneeker, Super Swoop, T-Square, Magician 35, Scat Rat and more, including some original designs were flown over the years. What may seem like silly training techniques can pay off big time............it did for me. ......