I bled it by fitting a hose and sucking the water through it with the end in a pot, tasted nice. I pumped the lever it's full travel for about 5 minutes whilst listening to the radio, and it didn't leak. The bigger O-Ring is a bit tight in the bore though, so I'm planning on taking it out a bit more, hopefully I'll get the deepest scratch out! (From where the spring rusted and snapped and took a gouge out of the side of the bore). Should be able to test it soon, I have bits on the way that I will be able to use to make a front maggy, so I'll wack that on the T-Pro and see how it fares.