Thank you for your appreciation. I hope my designs work also for other people and that their / your workpieces turn out at least as good as mine 
@spacegrey: as I wrote, the most important thing is a rectangular cut on the left side of your square tube. This ensures a consistend reference. For the repeatability at switching the sides, you may carve a pocket in some scrap wood where you could put in and clamp down the aluminium tube. Just an idea if you don’t have the touch plate option…
@RobP: I already posted the mount but I did not publish the files yet because they need some optimisation 
Lowrider2 - router carriage with quick release mod - LowRider CNC / Hardware Development - V1 Engineering Forum
Cheers
Richard