Machine tools Vacuum extraction

Workshop vacuum extraction can be frustrating as the extraction port sizes are not standardised and indeed neither are vacuum hoses. Furthermore adapters are expensive and the correct sizes are hard to find. I have made three adapters that function well. The vacuum hose I use has a tapered end for which 31.5mm seems to fit well. I have attached three fusion 360 files which are based on the same underlying model so the diameters can be altered to fit your own requirements. For those fortunate to have exhaust ports and hoses like mine I attach the .stl files. These are as follows:

Wood thicknesser
Internal diameter 31.5mm, External diameter 35.5mm
to
Internal diameter 94mm, External diameter 97mm

Mitre saw
Internal diameter 30.5mm, External diameter 33.5mm
to
Internal diameter 31.5mm External diameter 35.5mm

Band saw
Internal diameter 31.5mm, External diameter 34.5mm
to
Internal diameter 31.5mm, external diameter 35.5mm