G'day Jedo,
Congrats on the retirement AND a new van!
I have a new Jayco Expanda and although different to the discovery the only thing I'd be looking at in yours is the size of the screws in the drawer slides.
My Jayco has just done a 9000 km trip from Hobart to Pt Douglas and the only problem I had was two drawer slides shaking loose on the Newell Hwy North of Moree. Easy fixed, and this was the only thing in a brand new van / tug combo that needed attention.This is also why I cant tell you anything else to look out for.
Hope your new Jayco gives you the same enjoyment.
cheers, Paul.