A bit of a delay with the progress, have been pretty busy with the work and kids stuff plus with the shipping delays have been waiting on some parts, but have resumed in the last few weeks.
Currently moving through the chain attaching the shelf mounts - not sure if there is a correct way of doing it with this type of chain, but it seems to work - I just have to be careful not to grind too far, but I guess the years of "precision angle grinding" have paid off and I haven't wrecked anything yet.
Each set of mounts is separated by 14 links, I remove the pins and replace them with an M3.5 bolts (this is what I was waiting for to arrive, together with washers and nylocks)
The great thing is that I can use the pin spacers from the spare chain I got as spacers to push the brackets out (which helps with clearing the bolts that hold sprockets in place):
Here are the first few mounts hooked up - it's pretty important to get the order right as they are a mirror copy of each other as far as the mount overlap goes, but at the same time the same bracket has to be on top on both chains, etc. It's easy enough to fix but i'd rather not have to go back and dissassemble the chain once it's on, so triple checking each set of brackets. It takes a while but it's about the journey, not the destination.
Also I have finally solved the problem of electrically insulating left and right chains - I had the chain mounts insulated a while ago however still struggled with the drive - insulating the socket on either side was hopeless. So decided to cut it in half, and join it with some resin with some paper spacers to push it apart a bit. This worked mint, it's strong as hell (well i guess we'll find out for sure when the drive is hooked up), and it's not shorting out, so I think this will be fine when I finally go to run power to both chains: