Peter, I am a former RC08 owner, and collimation of the RCs can be very tricky. Personally i wpuld not obsess about focuser tilt, it is not the main issue. The interplay of the two hyperbolic mirrors are where people get into trouble. I suggest you read some of the many RC collimation threads, like this one:
https://www.cloudynights.com/topic/6...2#entry9140153
BTW, if you have a TAK Collimation scope that should be all you need, but a bright surface and light into the TAK scope is very important.
Always adjust the secondary first, try not to touch the primary if you can, because then you have to adjust the secondary again, and on it goes. RCs are both really beginner scopes because of the collination sensitivity.