I can see how this is going to pan out, I'll drill loads more holes and the flow won't be enough so I'll end up cutting it anyway Thanks for taking the time to post the diagram Zen, here's a couple more snaps of the new sport, 'extreme solvent weld fixing' to say thanks, either that or just me looking silly whilst being upside downzennzzo;2250977; said:You know, if you are drilling symmetrically you could make the slots offset to each other and still maintain strength...