Prevost XL II 40 w/ OTR?

So I've found a coach that interests me. It is as stated above and has OTR. My question is what is left under the belly for storage? I know you loose one bay going to a 40 and I assume you loose another w/ the OTR. Does that mean only a 1/2 bay is left for storage?

Thanks

Not real sure on a 40 but the bays for the OTR are also used for the fuel tank therefore OTR only uses 1/2 bay on each side.

Don't know how your coach is set up but our 40 foot coach has the entire front bay wide open clear thru.