9mm vs 11mm pumps

[Toby]

Guys im going to lock this thread if the "information sharing" argument dosent desist.

for my 2p worth you dont really understand how anything works untill youve taken it apart. Same goes for engines as well as pumps and that.

You can get a bosch pump for £40 so buy one and have a go at taking one apart and youll understand it ALOT better.

What argument??

+1, what are you on about?