
i really don't know why none of those youtubes and pages don't just show the dimensions. i haven't got a printer and tracing paper.
some time later, thinks: yeah, so 40-something euro may not be a bad price, for the hassle and time spent. plus, my result, though not bad at all, is not what i would call good design: are these things supposed to clamp the volca in? that would never be my choice. with my thing, it doesn't even really work, it's really dodgy, like something could fall out (the top one). so i'm stuck halfway there, scratching my head thinking what next.
some of those racks offered on ebay are starting to look quite attractive.

quite like the 3D printed "double 3" - that's one of the best designs.
and some of the better wood side one have indents that retain the volca.
i could do that, i guess, with a chisel, wouldn't take long. but lining this stuff up, and being really precise - the time! the mess... leaving volcas lying around, just to check them against the slots...starting to make a lot of sense to just get a readymade product.
looked at a few other possibilities along the way; aluminium strips, that sort of thing. those racks are really ugly but are probably the best approach.
ideas? thoughts?