For solos?
Yes that should work
simplest way is to use one of your FX blocks as a boost.
You could also control the output volume with an expression pedal and set the working range (ie min = rhythm volume, max = solo volume) to save consuming an FX block.
You could get an additional pedal that offers a similar function (compressor/volume/boost/etc)
going a step further, and a bit more technical, you could access the rig volume via midi control, as demonstrated here:
thread in these forums-
Hi slateboy - I use the midi option at the moment and it’s great but my midi pedal doesn’t have any kind of ‘light’ to say it’s on or off - sometimes it just stays on because I forget lol - after some form of knowing that it’s on lol
sympathise with your situation.
The limited visual indication of which FX blocks are on and the "yet to learn" coded "bank-numbers-by-colour" on the player does make it a little harder to use than the rack or stage. Though i appreciate what Kemper have done with a compact unit is awesome.
Certainly some visual indication on your midi device could prove highly useful.
Out of interest, sfa_100 what midi device are you using and how are you using it ?
I don't know if this will help but I often set my loudest tone at guitar knob - full volume, then I roll down for rhythm and roll up for my boost. If you get into a habit with it then it will save you a block.
I set the volume pedal at +2dB or whatever you like and post stack. And turn it on off via external switch/vol pedal.
Don’t know if you can trigger it via midi. I’m assuming so.
I would use the loose-one-fx-block- option. But instead of a pure boost use an eq, with which you can boost the frequencies useful for cutting through the mix. I personally like to boost around 1k.
