This guard protects your gimbal from damaging when touching obstacles.
PLA with carbon reinforcement.
PLA is better for this.
Do not recommend 100% infill. 20-30% is enough.
Carbon makes this part MUCH stronger. Definitely needed.
Tracker mounted with double sided adhesive tape and fixed with small zip tie. You can use it without tracker - no problem.
This version is very good, so I would not modify in the near future.
Print, mount and fly.
And yes, yellow strip at the picture - this is velcro, that I use to prevent stock gimbal holder from taking apart.
Print with PLA, 25% infill
Add carbon insert (~1mm thick, ~5mm width ~150mm long)
Carbon can be fixed with zip ties (take a look at the pictures)