so looking at the wiring diagram, i would be cutting into the feed to the switch, put that load through a relay and use the light switch to trigger the relay. and you will need to do that for both high and low beam its certainly will help with the life of the switch !!... oh beer!! dont talk to me about beer right now!! i am full of the bloody flu ! stuck at home trying to get rid of it, and no pressure! the sparky is here tomorrow to do the pre wire of the additions, i have to get the gas fire piped and installed this weekend as the insulation guys are here Tuesday to fit the wall and ceiling insulation (cheaper for them to supply AND install than i can even buy it for)
30 psi would have been my answer mate, but to be 100% ask your tire shop guy or google your tire brand and size and see what the manufactures says the psi should be
mate!!!! every time i walk past the 64 i look........ i smile!!!!!