Vacuum boot, 80mm spindle

Simple vacuum boot for DIY CNC machines using a 80mm spindle and a 31mm OD vacuum hose. I originally designed to use 1/8" bristle brush, but had a hard time locally sourcing it. So, I designed a TPU substitute. The only hardware you might want, but don't necesarily need, is a 3.5" hose clamp to hold the boot firmly in place. The boot fits snug enough, that it holds it's place. Also, you could scale the print -0.01% to make it a tighter fit.