Can equatorial mounts be used at lower latitudes?
Let me answer myself: Yes, they can. I got a 150mm x 1400mm Newtonian with a EQ mount and I am able to align its axis... even if it had no scale, it can be done with a cellphone (I have already done it... both for pointing north and adjusting latitude).
WARNING: Need to be careful that the weight doesn't go off-balance.