To get collimated get the dead center of the polar scope on the dead center of the ra axis. You have to do this by rotating the ra axis and adjusting so that the dead center of the polar scope never drifts off the target in the polar scope. Remember you are aligning the polar scope with the ra axis of rotation not the telescope which has its own ra axis collimation issues.
Wes, Southport NC
EXos2-GT PMC-8, iExos 100
ES ED 127, 10" LX200GPS+wedge, Astro-Tech 8" Newt, ETX-90, 60mm no-name guide scope ~ 260mm FL
Polemaster, Orion ST-80 and SAG, ZWO 290MM, D5300 astro modified
Nina, Bootcamped Mac Mini control computer, RDP to iMAC
110 amp hour lead acid deep discharge battery for field power
Electrical Engineer, Retired