Don;t think so Andy, I used the photos to put the thing back as it came off, of course I could well be wrong, mechanical things and I don't mix The cap screw is the problem now as the internal faces are so soft they have given up , a bit like me !Have I got the wrong end of the stick John? Seem like you are saying you turned the black plate over?
If you refitted it upside down then that's probably why there's no pressure at as the diaphragm valves will now be working the wrong way.
I've ordered a new Iwata , not going to mess around. Will keep the old one and let my mate have a look whens he's fit and well .
Thanks .
John.