These arm guards are designed to protect the arms of the BQE 3AF frames, but also fit several other BQE frames including the BQE SX3u, SX4u, and 4mm Grom frames.
Big thanks to AJ Lux for designing these for the BQE community. Be sure and give AJ a shoutout if you print your own guards!!!
They should be printed in TPU at 80-100% infll, with supports turned on to generate a small support under the lip of the arm hole.
I can confirm that using 10% supports that are 1.2mm horizontally away from the model walls will generate a quick printing support that is easily removable if your bed and layer heights are properly calibrated.
You can pick up a BQE 3AF here: https://bqe.io/shop/bqe-3af/