Latest image looks good Adam
Did some star testing on my RC8 after just receiving a tilt plate from Bintel.
Noted the new tilt plate didn't have any locking grub screws next to the three adjusting bolts. I used a simple collimation/chesire cap to align the focuser to the secondary marker using the tilt plate, then the Tak scope to align the secondary. Used the Tak scope to tweak the primary to get the baffle tube and secondary lined up { the primary lock down grub screw where not locked down on my scope}. Did five iterations of this and a visual star test {through an eyepiece, no diagonal} which looked spot on.
Encouraging to see the weight of your imaging train doesn't appear to interfere with collimation, been worried about that with the GSO RC design. Think Moonlite has a flange/collar that separates the focuser from the primary mirror housing, although I thinks it's only available for the 10' and up