the largest mill bit my school has (widest more like it) is 6mm the channel is 16mm wide so 16 - 6 - 4 - 6 its the best i can do
i was thinking 14 was alittle to much ...
explain the plumbers gasket material ?
and i certainly will have pics
im getting a heatercore this weekend, the copper and perspex block on monday which leaves the tubing and a pump