In addition to illegally welding on a new coupling the trailer is also getting a couple of water tanks for beach trips when the camper is otherwise occupied.
The bracket creep has returned! Plan is to fit two 59L tanks under the front half of the trailer floor, connect them together and have a hand pump for potable water needs, a connection to the hot water system for showering etc and a common filler. I struggled to find 1" hosetail connections that were potable water grade. Finally found some made by a company in Germany and there is a local supplier so the bits are on their way to me. Interesting that when I called a couple of caravan places they swore they only use John Guest potable water safe fittings. I know this is bullshit for the filler, and I guess they use low density poly irrigation fittings. Anyway not to worry the right parts have been found. All hoses including breather will be potable rated hose.
I have a most of a sheet of 1.2 gal which is stiff enough if dimpled in the right places. A few hand sketches later and a design appeared. I tried using CAD for this but really I am too old and think better if I can scribble on a bit of paper and leave the original lines and draw over with the next idea...
What looked to be a damn good dimpling on paper was not doable because the dies overlapped the previous dimple so a few went from 1.5" to 1" and so on. I have a small capacity finger brake and this was perfect to fold these shapes. A little encouragement but nothing extreme and the folds are neat.
Test fitted on the pointy end of the trailer. I should have made the leading edge a folded seam but too late now. I may well have to put a front on anyway to keep the wet sand off the bits. We will see. I was planning to mount them with M6 rivnuts in the brackets and bolted through from the trailer but a quick engineering review suggested M8 would be better since I was all out of M6 rivnuts and had plenty of M8s.
And here with the hand pump and filler installed. Just need to grab some sus M5 cap head screws for the filler. And mount the tanks...
Because the sheet is so thin I just rivetted the brackets together with sus rivets.