I can't see why -
1. The Jup-8 does'nt have a FM option like many other filters have.
2. The Multimode Filter does'nt have the Engines and the Mod OSC options availble for the FM option. Especially as the modes can be selected in other parameters, and then actually work in Multimode, when selecting the Multimode Filter.
I suggest this to be added/ fixed.