That's ok mate - just wanted to make sure I wasn't being really dense there! Thanks for confirming.
I like the idea of using other centre bands to mix & match etc and vary what sizes suit the bands when turning, but for these 5 the guy just wants them straight and slim at least.
Might get some of those though, thanks for the heads up Peter.
I finally managed to buy a laser module that's suitable for doing engraving so once I get that I need to make/get a suitable heatsink and power supply, then I can lash it on my mill/cnc machine and do laser engraving on wood products. Huzzah!