Mike,
I have a lot of time for Matt and his opinions, but in the end the speedster offered me the best solution for my current needs and budget. Thanks for silencer tip I shall have a bash.
Dave,
My concern is at some stage I will have to take a machine into residential flats and run it in a corridor or something and it's just too loud atm.
Sometimes you have to make do with what you can afford. Better that than going under and never aspiring to the dizzy heights of truckmountdom.
Your machine is a snorting beast, my nextdoor neighbour reckons the noise set up a standing wave in his fish tank.
Hope you get the roof on.