Can a Leer truck shell w/Thule rails hold 2 Revo 13's

I'm hoping to tap some practical experience on the forum that includes running a Thule Hullavor on a truck shell.

I'm looking at adding a Leer 100XL to my truck. Thule rails are an order option.

Can the shell roof with those rails handle a pair of Revo 13's at 60 pounds each? Shell dealer says it is rated for 240 LBS. I'm wondering if the fiberglass can just shrug off the lateral stress of the Hullavor.

But, I've no experience with Hullavator. I suspect I'll need the wider rails to accommodate the two boats.

Thanks for input