Fiamma Waste Roll Tank fit in Bailey etc

Tirril

I am looking to replace my waste water tank. The Wastmaster is too large to fit into a locker - other than to stick it under the fixed bed when travelling. Fiamma do a roll waste alternative which is 33 cm wide. The side lockers on our Bailey Unicorn are
also 33cm. Same as other Baileys I guess. I am hoping that the Fiamma will just squeeze through. Can anyone confirm if it does?