Received today my Andonstar A1 500x digital microscope and I'm currently testing it. There are quite a few reviews on YouTube about this microscope and most of them are positive. The reasonable sturdy metal stand is also well received. The only problem with the stand is the amount of play between the inner- & outer-tube (red arrow). On YouTube there is somebody with a solution; he machines with a lathe a whole new inner-tube with much smaller tolerances and solves the problem that