E
Engineer54
If you want the calcs done my FA mate is an ex civil engineer with a masters in mechanical
he has just designed on the side a device to be hidden under a ceiling light that when used is a full bore leather harness swing for those 'nights in with friends when the kids are away'
Hes retrained to be a plumber and lives near me so we are offering drips and sparks as a combined service !
You have a mate that's both a Civil and Mechanical Engineer, and has retrained as a Plumber!! I'm literary gobsmacked, lost for words even......