What Tailgater did you order, the King VQ4500. And may I ask where you ordered the Ladder mount?
Tailgater | KING
I have the Dish VQ2500, which is made by King. That particular model (VQ2500) is now discontinued. The Ladder mount I designed will hold the VQ2500 or the VQ4500.
My design should hold any Portable Satellite dish, within reason of course. If they get a bigger (footprint), a larger mounting plate might be necessary. The mounting holes would be drilled accordingly, possibly by the purchaser.