Malyan M180 Curtain Mount DIN A4 for ABS printing

I am having a hard time printing ABS on my glas bed since it will shrink so fast and so significant that warping is a real problem, so I tried to keep as much hot air inside the frame and designed those curtain mounts to hand a sheet of DIN A4 paper on each side :)

It won't fit the print bed unless you rotate it to sit diagonally and to not exceed the limits with the skirt, I set it's distance to the object to 1mm.

I print in ABS at 220°C at a speed of 70mm/s and the bed at 105°C for the f