How heavy is the current bed? The delta is really all you're worried about. Because I'm sure you are all ready sleeping on the bed on the slide.
Are the slides lippert? If so, they likely do not have rollers.
Heck, if they DID have rollers, you'd probably be better off!
But since the unit is so new, you probably still have a plastic bag from the manufacturer that includes all the manuals and documentation specific to the unit. You might get lucky, and as you read the manuals, you might find the info you seek.
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2007 Chevy 2500HD crew
2015 Jayco Jayflight 32BHDS