Focus points and balance points for Daystar Hydrogen Quark Solar Filter on Sky Watcher 72mm DS Pro OTA without star diagonal and HEQ5 Pro mount

I am using a 0.5x Astro Engineering AC555 0.5x Barlow lens screwed onto bottom of Quark.

Notice that Quark can’t go fully into 2″-1.25″ adapter due to fact that extension on bottom Quark from AC555 would damage 2″ UV filter on bottom of that adapter if I pushed it in further. In spite of this I can’t fully push extension tube into focuser or otherwise the Quark won’t reach focus. This is first time I have successfully used Quark without star diagonal and extension tube required to make up for length of light path in star diagonal.

Andy