Yes none of the moerman handles will hold any wide body channels the only zero degree I can think of that holds a wide body channel is the ettore contour pro +
Ettore makes a handle for wide body channels that is adjustable and can be used at zero degrees. I think it is called the contour pro plus super system handle. Just make sure you get the one for wide body channels, they make one that is also for standard channels.
OK. Chris or Alex. Can you validate this statement? I do have an Ettore Contour that will absolutely NOT take a wide body channel. Is there another Ettore Contour Super System that will? I am still searching for a zero degree handle that will hold a Sorbo channel.