CMW Merica 5 & 6 inch arms, (5mm & 6mm tall) Arm Guard Open & Closed bottom

I needed 6 inch arms for a CMW Merica frame and the arms are 6mm tall versus the 5mm tall on the 5 inch arms. I wanted to protect those as well but wanted to design my own for learning 3D modeling and I copied their design and adjusted it to fit my needs. I purchased arm guards and many other components from CMW and continue to support them.

Two Options:
-Open hole on bottom (similar to CMW design)
-Closed hold on bottom (more TPU cushioning the blow)