I just took the beast for the first real ride that wasn't just a trip around the block.

One of the objectives was "remain streetable". That, it is. It takes a little more effort to get it turned (the steering is a little heavier, but it still feels reasonably neutral - doesn't want to stand straight up, doesn't want to fall into the corner) and it's still possible to chuck it around on twisty roads. Acceleration is violent just the way a 1st-generation ZX10R is supposed to be, but even more so and it stays rock-solid stable when doing so ... which wasn't the case when stock. This is going to be entertaining!

I think the amount of extra wheelbase is pretty close to right for the gearing. There is enough weight transfer so that it will accelerate hard in 1st gear without spinning the tire and without having to do a burnout first. (Go too long and low, there won't be enough weight transfer, that's when it'll just spin the tire.) At the track with a properly hard launch, it'll probably still be possible to pick the front wheel up, but it should come back down again without having to back out of the throttle (this was a big problem with the stock wheelbase and ride height). If needed, burnouts are ridiculously simple ... it will light up the tire at 3000 rpm if you ask it to ... Had to try this just to make sure

Never thought a stretched bike could work so well. Very happy with this as it stands right now.