Folding 20 Litre Topbox

[gurahamu467]

Hello.
I wanted to add a bit of storage, but not something I'd have to avoid when I wasn't using it, and nothing which would stop me wearing a backback, or getting a tent on the storage plate when needed.

• What I went for was a 20litre folding box from local company Captain Stag. I even found one in black to sort-of match the bike.
• I made a template based on the bottom of the box for size, and marked on the 4 * M6 Pitch 1,0 positions, then slowly drilled the bottom of the box. By a stroke of luck, none of the holes impacted the thicker support struts and in the end were pretty much spot on.
• I then cut a silicone mat to fit the interface size of the box to the plate, to try to prevent any scratching or vibration, and then mounted the box and mat.
• I used the 30mm M6 screws with a cut piece of silicone as a washer between the plastic box and the 25mm M6 steel washers, to try to avoid the washers biting in. (From the bottom of the internal storage area, to the actually bottom of the box was about 15mm.) I also tested that the side-walls could swing in using spacers.

I'm happy with the outcome, and should work fine with a 20L dry bag for smal grocery runs and camping supplies, so objective completed.
The one obvious issue is that the four holes are more central for something taking up the whole plate, but it seems to be pretty sturdy.