My thoughts exactly Alex, at the end of the day I'm not that worried if I don't get it, if I do I want it to be for a good price, to make it worth my while taking a day away from my regular round!!
If I do get the job I will let you know how I get on with the omnivac Darren, I haven't heard of many people on hear praising them either, but if they work well I think they could be a very good investment!!