See attached my revised endcaps, their made of aluminium and are fresh of the lathe. A big thanks to Ken & Chris for machining these!
The principle reason for this upgrade is to provide a better seal for the O rings. Additionally, a sufficient recess has been machined to allow space for the ESCs and thus use the endcap as a heatsink.
Next step, send the endcaps for a marine compliant anodizing.
I’ll post the designs shortly.