We have a gooseneck to fifth wheel adapter you could use with the Convert a Ball part # CAB-C5G for your Leland 7921 but there isn't a Reese Goose Box or anything similar to that style of adapter. The Convert a Ball attaches to the king pin and gives a gooseneck coupler below it. view full answer...
I recommend the Ultra-Fab Power Twin II Electric Stabilizer with Dual Motors, # UF39-941705 for your 5th wheel RV. The dual motor arrangement of this option provides left/right adjustment independently of one another for simple, effective leveling. This has extra-large footplates in place to help to minimize sinking and tilting along with an emergency hand crank in case of power issues. This is intended to stabilize the RV, not lift it.
The Lippert High-Speed Power Stabilizer Jack, #... view full answer...
For the 6,000 pound axles on your 2007 Jayco Jay Flight Trailer, you will use 12 inch electric brake assemblies. I recommend looking at the etrailer.com Electric Trailer Brake Kit # AKEBRK-7-SA. These self-adjusting, 12 inch assemblies are designed for 5,200 to 7,000 pound axles and feature a 5 bolt mounting flange pattern. You will just want to make sure this matches up to the flange on your axle.
This kit will include both the left hand and right hand assembly. I have attached an installation... view full answer...