Westfalia Towbar Plug GT536

Westfalia tow bar plug for a 2,000kg rated tow bar fitted to a Gen 7 Subaru Outback (2021 onward). The removable hitch has a number GT536 on it.
The plug is intended to keep dirt out of the socket when the hitch is removed.
It is a remix of creja202 design, but I ended up doing my own design to fit my tow bar. This file is marked version 6, as it has taken a few attempts to get it to fit. This version incorporates a groove for an o-ring to help it seal, without it the plug is loose. I used a 1" o-ring because that was the largest I had. A 1-1/4" size should work better.
Printed on a Bambu P1S with my new favourite material, PCTG.
PCTG has fantastic layer adhesion, making it very tough, same heat tolerance as PETG and doesn't clog. Also prints quite quickly.