You can have momentary morphing from the 5 Rig footswitches at the moment but I don’t think it can be done on a per rig basis
Another thing you might want to try is assigning one of the top row 4 FX switch to Rotary Speed which would leave Morph free for something else.
Would be cool to have the Morph be Momentary in some cases (rig based).
As already mentioned above you can have momentary morph on the rig/slot-selection-switches on the remote. By default morph with these switches takes 2 seconds, but the morph-time can be set per rig. The only thing I've been missing is an option to set a global default morph-lag to somewhere between 0.5 and 1 sec instead of the default 2 sec. I often use morph for solo-boost and have to edit many rigs to make it faster. With the default adjusted to 0.5 sec I would almost never have to adjust it.
