Gooseneck flatbeds

[C_Schomer]

I usually built my own 5er friendly beds but I won't have time for that, this time. I'm picking up a new to me truck at Cave Creek next Saturday and I'd like to have it upfitted before going to Az.in December.
I've been shopping for g neck flatbeds and I think there are aftermarket 5er hitches for them but I can't find details. I see a companion hitch for a turnover ball conversion but these g neck beds look like they only have a screw-in ball. I also see a Holland 4 way on a flat mounting plate that should bolt down to anything flat. The dealers are closed today and I'd like to know. TIA! Craig

[C_Schomer]

I'm looking at the Knapheide PGNB and I'll call the dealer tomorrow for more information. It looks like the square pin on the companion comes off so I could drill holes and bolt it in the gneck hideaway. Thanks for the Holland #. Craig

[noteven]

If you call B&W they might tell you what flatbed manufacturers buy their weld in mounts for turnover ball/Companion. I'm rigging a Knapheide flat deck that comes with a gooseneck ball below deck in a crossmember. I will be changing to a weld in B&W socket. The flap on the deck will close and leave the socket exposed through 4" hole for using the Companion 5th wheel. For gooseneck I will open the flap, drop in the ball and to access safety chain hooks.

My KW has the Holland wheel you refer to.

It is a FW0001 8000lbs pin 30000lbs trailer capacity.