I ordered CNC belt driver wheels a bit quick and realized just now that their hold is 6mm while the shafts on my steppers are 5mm. The extra 1mm meakes a “hump” as the belt move and the combination is not a nice, smooth belt drive – so new belt wheels have been ordered. I am still waiting on tubes anyway so it will be february before the PnP is running. But, ordering parts from AliExpress used to be 8 weeks while it now is more like 2-4 weeks. Things have improved. I have to pay tax on everything, but all this is nicely organized from AliExpress. That said – some parts are cheaper on the local hardware shop.