Andyshields are crap as they do not fit a standard industrial quick connect lance without clamping it onto the turbo itself. Then it gets in the way when wanting to clean under patio door sills, in corners etc so is a complete waste of time and money.
Regarding the funnel method have you tried it as it would need to be kept flat on the surface to work? Again I would have thought would be quite useless in corners etc.
What do you lads think?