The first and most important thing you should realise is that cast aluminium, most aluminium for that matter, is a damn side softer than steel.
It is very easy to force the steel bolt/screw and strip the thread in the aluminium casting.
The more weight the EQ6 carries, including counterweights, the harder the bottom bolt will be to turn, as all the weight rests on that bolt.
My EQ6 is pier mounted and carries a 10" F6 Newtonian and a SWED100. The only way I can adjust, move, the bottom bolt without damaging/stripping the aluminium thread, is by removing the end cap and pole finderscope, inserting a wooden or steel bar, undo the top bolt slightly, take the weight of the bottom bolt by lifting the bar enough to relieve the pressure on the bottom bolt and do the adjustment required.
Remember, life wasn't meant to be easy
