The full image when presented at a 50% reduction actually looks quite good - but there is an underlying problem here that needs to be resolved. The scope was collimated using a set of Catseye Tools at f/5 prior to inserting my ASA 0.73X focal reducer.
Images recorded with the ASA corrector installed and the default alignment (generated by the Catseye Tools) show oblate stars. The image posted here was "improved" by making small corrections at the PM to improve star symmetry. As you can see, the final result is marginal at best. With additional effort I am sure it could be further improved.
I felt justified adjusting the PM alignment since it is at least possible that the corrector introduced some tilt that was not present during the original collimation performed without it. Is this a reasonable way to proceed? Also, is there a systematic way to impart PM adjustments with the only feedback being the star field displayed on the monitor? With three adjusters on the PM and two directions (CW and CCW) it is easy to walk way off when trying to improve things.