Permanent pier mount tip: you don't need to level a pier to get accurate polar alignment.
The reason I mention this is I've seen a number of leveling bolts /plates on various piers and have wondered why.
While it is true that while you will not get an adjustment in Altitude having a secondary effect of a change in Azimuth and vise versa) but a couple of iterations will easily fix that.
What you do get is three or four leveling bolts taking the entire weight of the mount/telescope/counterweights and acting like springs...not good if rigidity and a high natural frequency of vibration of the system is your goal.
Hope that helps if you are contemplating pier mounting a telescope
