ive had these 76 style radio knobs that ive been considering putting on the bass for the longest time probobly before i got the thing. anyways the thing is the knobs are not nearly as tall as the current knobs on there. i was wondering if anyone ever took off their old knobs and per chance measured the pole thingy that the knobs turn. how tall are those? im hoping against having "floating knobs" and rather ones that rest against the pa nicely. thanks for the help!