Airsource Ltd wrote:

Anyone used one of these? There's a used one up for sale within
driving distance, which I'm quite tempted by....

A bit flash for my tastes:

http://jrussbeauchamp.com/item.php?id=1174

Or if you mean this:

http://www.youtube.com/watch?v=6VrSbn69zWo

We don't need that much silage on my farm.