That is brilliant
I was in the same boat as a lot of people and found my standard ST3 brakes to be a little lacking, had given them a fresh bleed new pads was on the market when i stumbled across this by chance
the master cylinder is off a gsxr 600 09 model, its an 11/16th piston (17mm)
brake lines bolt strait up with no modes needed, lever feel is so much better then stock with just a bit more power.
overall Im very happy with the final result
a mate had one lying around after he upgraded to a brembo rc19. Ive seen them on ebay from $30 - $100 well worth the small price for better braking performance, and being off a gixxer there every where and plenty of spare parts plus after market