Dust extraction issue

Hi all, need some advice please.

I have just bought and installed the Axminster Workshop AW37E Dust Extractor - 230V. The outlet is 100mm (2m in length) and I have added the 75mm flexible pipe (2.5m in length), can I reduce it further in size so it can fit my machines outlet, all of them take my hoover attachment, so want to be able to do the same with my new extractor. Is it possible? It busting my brain at the moment.

What additional kit do i need?

Only one machine is used at a time.

Kind regards, Jon Chesney.