How does my contraption look??
Glass breaks. Imagine what would happen if you broke a fanbelt or got into a front end collision. Spin the entire reg around so the fuel inlet points towards the fender, put a metal filter on it and mount it to the fender. Yeah, the adjustment screw will be a bit harder to get at but you really shouldn't have to mess with it once it's set. Also, if that gauge is liquid filled, it will get stupid innacurate when it gets hot. I can't tell for sure but I don't think it is.