Force 300CSM MTU unconfigurable (and other thoughts)

I received my first batch of f300 connectorized SMs today.  I like the weight of the units.  I despise the cable gland as it requires using a screw driver or other tool to release the clip on the ethernet plug.

Ranting aside - I don't see the MTU being configurable on these units running the factory software 4.1-RC002 or in  Is the ethernet MTU the typical Cambium 1538? Can it be increased to 1700 in a future release?  I sure would like to see larger MTU being supported by Cambium on these in the future. 

I notice also, that running 4.1-RC002 on these units I have DFS channels available.  Once upgraded to those channels disappear.