Cheers Mark...I was losing suction (on my first ever job aswell

).
The machine was fine a week before when i practiced on my brothers house.
I rang Alltec and i have sorted the problem.
The waste gate(think that's what you call it) was not closing properly.
If i need any repairs/servicing in future i will be in touch,
i am in Accrington so not too far away...Cheers Dave.