Final question - this is my OCD talking now...
I originally bought a prototype clock decal from Marco, and tried to fit it to my Pinbits decal plate. It ended up being very difficult, mainly because it was so sticky, and curled around after I removed it from the backing material, but also because it is smaller than the decal plate, so alignment was difficult. Also the one I received had no holes where the shaft or screws go - but looking at the website that seems to be normal?
I had three attempts at fitting it, and it looked messy with fingerprints visible, etc. I ended up ripping off the decal and throwing it away, and cleaning the glue residue off the decal plate, and then bought the PETG reverse printed version instead (I stupidly only bought one decal from Marco, thinking it would be simple to fit, even though I'm in the UK and shipping cost as much as the parts).
I've received the PETG one which has holes in the right places, the right font for the numbers, etc. The problem I have with it is very minor - but it's preoccupying me - namely that the gold of the symbols is more of an orange, and the symbols themselves are "thicker", if that makes sense (look at the scorpion between 4 and 5). Basically it just looks a bit poorer quality than the decal was, like it was printed in toner-saver mode.
I honestly don't know what to do at this point.. reorder several more decals and have another go, or stop obsessing and just get on with sorting the clock.