Basically, you don't want to use a wedge on a permanent pier. Rather you
should endavour to mount the scope to the angled pier itself and that means
that the pier surface won't be level but rather related to the polar axis.
Basically, why include a wobbly wedge when you can have a perfectly solid
pier itself to mount to?

--
Bob May
Losing weight is easy! If you ever want to lose weight, eat and drink less.
Works every time it is tried!