Simple DIY fixture to hold your rack square and true when you relocate it. it will hold the rack in any of the following positions 25mm, 40mm and 50mm. Simply fold the Left and Rights sides up and tack and your ready to get welding!
3D printed rack centering jigs available
Note: have a pair of junk tie-rods handy to thread into the end of the rack through the fixture to keep it in place