Upgrading a CR-30 Belt Printer

Greetings everyone,

I’m in process upgrading a CR-30 with the linear rail. Question for the E3Dv6 hot end mount. I’m getting some deformation of the part from the tension on the belts. I felt I applied the same what felt like the same tension from the stock mount, but the plastic deformed a bit after sitting for a weekend.

I used bambu PLA to print at 100% infill with 4 shells. Maybe I should try a 50% infill instead? I feel like PETG would end up flexing even more than the PLA. Any tips would be greatly appreciated!

P.S. I moved the holes on Stewarts rail mount to fit a Creality branded linear rail meant for Ender 3s. Seen here: