Personally I have found that blue line plus 10kts works well in most situations. Thoughts anyone?
also found something in #66 to be interesting about adding 10 kts to the blue line speed as a decision point, my main concern about that is that it delays your decision so you are further down the runway and have less stopping options in front of you. I would much rather reject a take-off earlier in the piece. I know about speed decay, I have done winch launching with launch failure in gliders!
It depends on the length of the runway but the simple fact remains that a light twin is not certified to get airborne in the event of an engine failure on takeoff. Blue line +10 gives you a bit of time to get yourself sorted but the biggest threat to your operation is your ability to overcome the startle factor and performing the vital actions quickly and correctly. Overrunning the runway at 50 kts but three wheels on the ground is still a better option than getting below Vmca at 200'.