Hello Magnus,
Regret delay, had work to do.
Here are some pics of mine that has been in storage for 40 yrs. Attempted to provide needed dimensions. PhotoShop is acting up so will see. Anything that you want a better pic just holler.
Pretty sure did not buy this new. Some parts may not be original. Anyone that cares to chime in for help on that thanks!
These are "befores". Afters may be awhile :-)
The "plastic" connector looks to be nylon or an expoxy mix on mine. Matters not, it's gonna break. I'd make a replacement out of alum or S-Steel.
Didn't know I was missing the tilting screw so thank you for that. Also, had never noticed the hose clamp :-)
Creighton