Thanks Len I use 2 clocks parts I find the 3mm centre spindle are just about okay for a single album but the 8mm are needed if you use another album as the backer I have come unstuck with a 3mm before on a old thicker album so will now be using the 8mm all the time, as far as the thicness of the clock I have not had a problem with this yet I have a hanging screw in my little shop I affix the the movement loosely on the album and hang it make sure it hangs level then tweak it up. The hands I spray myself black a lot cheaper that way I do sometime times find the digital movement will move slightly no matter how much you tighten with the front nut which does make the clock slip and go un level at times I always check now and if it moves at all a few drops of what I call 2 part glue on the corners stops the movement no problems, mitre glue you may know it as basically a glue and spray activator instant bond. I find the thickness of the movement holds the clock off the wall enough when it is a single album to be able to get a nice shading behind the cut out onto the wall. Hope this kinda answers what you was asking . If I am not using a printed clock face and cutting numbers or sticking numbers on the outer edge I will use the longer arms all I get from ebay.