Fixed the problem with the right side Tbar. The Tbar 'socket' in the LCA had a different angle than the one on the left LCA. I thought that this socket was a fixed point (welded) on a LCA, that's why I pushed the LCA further down to get the socket aligned with the front end of the Tbar. But found out today that you can turn this socket to make it align with the Tbar. On the left side this alignment was already ok, now it is also ok on the right side and now my front suspension is a ok.
But.... of course this didn't solve my pulling-to-the-right problem as CP already stated.
Took the manual and read about this valve and saw that I had a self steering problem; when starting the engine I saw my wheel turning to the right, kinda spooky
Made some subtle changes to the position of this valve and now it drives like a train!
A big thanks to you Chryco Psycho for pointing me into the right direction.