I finally had the chance to launch the BOT ARF on a winch today. The winch line was almost straight into the wind most of the time, light, at maybe 2-4 mph. I launched it twice with no problems. I floored the pedal for the first 2 seconds or so, then did a moderately paced tap and even got a mild dip and 10-15 foot zoom at the top. I would say that the weak spars have been strengthened/remedied. But be carefull still, YMMV.