Thanks for the recommendation. I had come across this website in the past, but was rather put off by the commercial nature of it. It's bit like the hard sell with a 'double glazing' salesman (no offence meant), where the discounts get bigger as you read down the page

However it does sound interesting and your recommendation is helpful in allowing me to look past the marketing hype.

It's also a very small outlay in comparison to the Dick Grove material. Not much more than a couple of music lessons or a few beers.

I would still be interested to know of anyone's experience with the Dick Grove material.

Paul.