Thanks all for your input. I've spoken to a few white metallers including Terry Formhall who was vey friendly and helpful, but its sooooo expensive, way out of our budget, so after a few words of encouragement from Philb were going to tackle it ourselves.
When you sit down and look at it, its not really a complex procedure just alot of work, hence why its so expensive, and its this side of the hobby that i really enjoy.
Standby for updates, Richard