The big concern is that once the ECU is reflashed, you're stuck with it. And I really don't know why anyone would want to mess with the rev limiter. At 10,500, the engine's past it's horsepower peak.
For a bit more than $400, you can have a PC-V and Autotune, and can dial everything in yourself. The hardest part is getting the O2 sensor bung welded into the exhaust pipe. I have a little netbook I use to communicate with the PC, and it also has the service manual loaded for reference out in the garage.
10 Duc Streetfighter S (black)
67 Triumph Bonneville TT Special