How do I collimate a skywatcher 130PDS focuser to be square to the secondary?

[Lotinsh]

I may or may not have turned some of the wrong screws that mess up your focuser's alignment while working on modding my telescope, I've looked through some threads but I haven't found any solution that would work for me on how to collimate the focuser.

One method I saw was using a bubble leveler on the focuser and the secondary spider and aligning the focuser until it's the same level as the secondary's spider, though the stock spider of the 130PDS is flexy and both sides aren't perfectly straight, both of them flex enough by the tension of the screws due to their flimsy construction making it impossible to find which part should be used as a reference for the focuser.

Another method I saw, some telescopes if I'm not wrong include a point in the tube itself to which you can just align the focuser, however, the 130PDS doesn't seem to have that. 

What can I do now?

Here are images for reference:

R

[Mr Spock]

You can use a concentre to align the focuser as well as the secondary.

Took me a while to find the link due to the incorrect spelling of centre 

https://www.firstlightoptics.com/other-collimation-tools/ts-concenter-2-adjustment-eyepiece-for-newtonian-telescopes.html

[Spile]

I use a pair of compasses to check the spider is centred and also that the focuser is level. See https://astro.catshill.com/collimation-guide for diagrams.

[AstroMuni]

On 13/06/2023 at 20:15, Lotinsh said:

I haven't found any solution that would work for me on how to collimate the focuser.

There are a couple of alignment screws on the base of the focuser that allow you to adjust the angle. Is that what you are looking for?

Edited June 20, 2023 by AstroMuni

[iapa]

This may help?