Thank you Pilot DAR.
That's a very good point of yours about the failure to accelerate away correctly after lift-off, not generally taught, though it should be for short field work. I used to occasionally fly a motor glider with rather limited prop clearance & low power from a notably rough strip. Our take-off technique was to hold the stick firmly back until unstick, then stick smartly forward to hold at 1-3 feet above ground in ground effect while we accelerated out of the back of the drag curve. Felt 'orrible at first but it worked, just like your obstacle clearance lake technique. No dinged props and safe climb outs past the obstacles at the end of the strip.