Awesome! I wasn't sure which one to buy this 300W or a 500W spindle, I thought the 300W one would be too weak, but after I saw your video and that it can even handle aluminum I went for the 300W, it's enough for my use, mostly milling plastic and wood. Just a question, the power supply you use for this spindle is 36V or 48V?
I think I would have left the bit of aluminium that you cut off round the bed, as it did not interfere with the movement it would always give extra size for clamping etc.