20mm electrical conduit works great in 20mm dog holes, especially with end caps glued on to make them more robust.
https://www.amazon.co.uk/dp/B07VM8NSNM/
Hi, Just spotted this for the Metabo guide rails:
Metabo 629026000 FSW Guide Rail Mitre Fence
Where did you source the hinge part of your system, it looks bullet proof!
