Thanks for that guys. I had seen these but had not given it much thought before. Seems to make sense. Just youtubed it and was suprised how much quieter it is.
2 questions. £258 inc delivery is that about right? And i take it that there are a few threads with various ideas on providing the water?

I will post some pictures of my attempt in the build log section. Please have a cushion ready for when you ROFL:rofl:

Thanks for your good advice.

Bruce