Emailed them a question about my existing system and got a reply couple of hours later.

Wanted to know if the vacuum pipe just pulls out from the top of the unit. Turns out it does, just needs a bit more welly.

Good to see they look after their existing customers and process these 'web' based requests, was half expecting my question to disappear up the internet, never to be seen again.

So three hearty cheers for Scotoiler Tech Support.