The people who would have the data on the contrast version of overspeed would be Loren and Dennis Shaver. I don’t know if they respond to emails, but, obviously, Loren makes large numbers of presentations (for a fee).
You won’t see much on potentiation of overspeed for high level athletes, because most coaches are conveinced that it does not work or that the injury rate is too high. And for straight towed overspeed the literature is controversial at best (see the abstracts listed mid way through the thread), thus even if there was potentiation data it might well be wrong when applied in the method described in this thread.
I have tried the Verkhoshansky stimulation method (with sub-max weights) and found that it does not work for me for 100m. Seems to work well for shorter events with accel (so might be of some use indoors) but seems to fail when the sprint is long enough for SE to be taken into account.
I haven’t tried this as a warmup for racing, but it is worth considering. The UK pros were all over Southern California races this spring and I did see some warming up with light sleds, which I mentioned in one thread in April. I have had better results for downhill the flying times with 2X20m flat block starts preceeding the 2X40m uphill. I’m going to take longer delays (10-15 min) before each of the downhill flys the next time to see which is fastest.
Don’t know if the contrast method works any better once SE is taken into account, but it’s worth a try.