Anyone thinking about trying the above don't, just get it done.
I ran mine for the first time with them on tonight and what a difference. It's a completely different car, yes the steering is still aggressive (this will be resolved with gull wing wishbones) but if the back end brakes away it's recoverable and no where near as servere as before. It seems to ride the bumps better too and easier to jump if you balls up lining it up. I was coming out of corners and able to get on the power earlier. The grip and side bite generated is emense. It's what the car should have been from the start IMO.
I was on the verge of giving up on the car thinking it wasn't for mere mortals but not now I'm loving it.