Vacuum spindle adapter for and maybe othe using Adapter #1 from The spindle mount from the CNC vacuum mount and adapter doesn't really work with the portal cyclone cnc. The vacuum tube is too high and the 52mm clamp design made the Z axis travel shorter. Long story short, The adapte needed help. On my 400 watt spindle, there was a 4x34mm bolt circle on the bottom which is a great mounting spot for the portalcyclone. I also designed a hose support to help as a strain relief on the vacuum hose.