Thanks for comments
I have an old 80 litre machine which is used by my subcontractor on any larger jobs that come in
I snapped by top bicep just over a year ago and certain movements with strength are no longer an option, lifting is one of them,so lifting the large gutter vac is just literally a pain
The other muscles do start to compensate again over time but obviously without a muscle where there was one once, creates limits to your strength
I just wanted to here from those that use the smaller machines in specific the grafter mini as its a1800 so reasonable suction
If any one uses any thing similar I'm happy to take on board comments
It's only for occasional use as I'm mostly window cleaning