Skywatcher Pillar Mount - Polar Alignment

[Somerled7]

A question for anyone with the Skywatcher pillar mount. I am thinking of buying one for my HEQ5 to avoid potential collisions between the scope and the tripod legs. I understand that there is an adaptor with a central bolt that screws into the bottom of the mount head, then the adaptor sits in the top of the pillar and is secured by three bolts around the top of the pillar. How does this work for polar alignment? With the tripod, I loosen the central bolt, perform my  alignment, then tighten the central bolt and check that the alignment is still good. With the pillar, the central fixing bolt is not accessible, so does this have to be left slightly loose? I could not find any You-Tube vides that address this point, so any info from an owner would be welcome.

[almcl]

May have misunderstood this, but if it's the Skywatcher Extension tube (pics below) then the top mounting bolt includes a ballrace/washer arrangement that allows azimuth adjustment via the adjusters on the north peg, even when the head is tightened down quite severely.

My experieence is that both this and the north peg need to be as tight as reasonable (don't strip the threads!)

Edited April 15 by almcl

[Somerled7]

58 minutes ago, almcl said:

May have misunderstood this, but if it's the Skywatcher Extension tube (pics below) then the top mounting bolt includes a ballrace/washer arrangement that allows azimuth adjustment via the adjusters on the north peg, even when the head is tightened down quite severely.

My experieence is that both this and the north peg need to be as tight as reasonable (don't strip the threads!)

Excellent - that answers my question. I have not been able to find a picture of the top adaptor, so I wondered how it works. It's different to the standard tripod which just bolts up tight. I assume the pillar mount will have the same top plate adaptor as your extension tube. Thanks a lot.