Because the Tronxy X5S is quite high and the main emphasis is mostly also on the top I created that brace to stabilize the frame for fast short movements. You can use it at the front and rear of the printer.
For left and right I use this great part: www.thingiverse.com/thing:2753168 Thanks for it @atiszoft !
What you need:
2x M4 16mm screw 2x "V-Slot" nut's
I have had very good experiences with these "T-nuts" - thanks @OstinStar for the design!
But beware: The "T-nuts" have to be pushed in first. This means that subsequent use is not always possible.