Fuck off it wasn't my fault

I'd just spent ages doing a 2wd brake conversion and to my "sheer and utter delight" the pedal was hitting the floor with just a "hint" of braking. And i had put a 2nd hand 23mm master cylinder on as mine had a 22 so i figured it must be that, so theres me being all careful changing the master cylinder (spilling my expensive 5.1 braking fluid down the servo) to put another master cylinder on, and guess what, it was exactly the same