Alternately I flashed my JP with CK's code and I think I'm going to stick with it. Same speed as my code tweaks, but with < 1% errors (I was getting 2.5% or so) and several degrees less heat. I think his code turns off cores that are shot (I have several) and clocks up the remaining ones (to compensate).

As a side note, if anyone in the Baltimore/Laurel MD area wants to bring their jally over for a flash I'll do it for free/tips/whatever with my Dragon and atmel. I think ck's code is good, will drop him/her a tip if I can find her btc wallet.