Looking for a Dual tandem axle goosneck with a hydraulic dove tail. how well do these work? Is the dove able to support heavy loads? (tractors) What brands are available? I seen Brute and PJ. Thanks for any input, Roger

No experiance with them but these guys have one.
http://www.loadtrail.ca/lpg25-2.htm

Just re-read your post and you want a hyd dove tail. That is a full tilt. Sorry

Roger, these guys build some kick a$$ trailers. I doubt they would have a hydraulic dovetail in stock, but they will custom build anything. We've got just a plain gooseneck and really like it. All trailers are built about 30 miles from here.

http://www.felling.com/trailers-series.asp?Group=GN&Series=Steel+Gooseneck+Series

maclander is a great trailer too and not too spendy

Straleys have one, you'll have to check it out at a pull.