I recently had these same questions and ended up scratchbuilding all the above.
I used the Houston revolving cannon but put it on a carriage from Tiger's mountain gun if I recall.
The 4.7cm at the time you are looking for I don't believe is the naval one you commonly see referenced for 1914. I believe it is a very small and lighweight cannon. I think there are pictures on another LAF thread that I found. The gun comes up to about waist height. For this I used a 15mm Old Glory Napoleonic carriage and cut away some of the fittings. I used small 15mm limber wheels with the carriage. Then I took the barrel and cut off the end and attached a breech I cut off the old Ral Partha 6.5cm Krupp gun and glued it on.
For the 60mm mountain gun I did the same as for the 4.7cm gun only a little bigger gun barrel and set of wheels. Again, I think the pics of this were in another thread here on LAF about German artillery.
The maxim you should be able to find from various ranges.
Are my guns 100% accurate in all details? I don't think so, but they are reasonably close.