@sunbeast
All good info. I'm well used to playing synth lines an octave up when needed, for sounds created based on the OC-2 model in my multifx.
I'll not likely use a GK add on to a bass, but one where the interface is integral to the bass. I'm leaning toward the Willcox HexFx and GR55, though I'm not sure how I feel about the unique considerations of the instrument.
Industrial Radio has the solution I prefer, as it's a traditional jazz bass, but it is quite expensive and has a lengthy lead time, and is overseas.
Other less daunting, simpler solutions are the Unisyn interface ( or other ) triggering synth modules, or stand-alone synth/pcm pedal(s). These are generally monophonic devices, though, and thus limited in flexibility. I'd also need a few of them to cover a broad range of sounds. The C4 or Future Impact are flexible within their realm, but don't trigger PCM sounds, or feature polyphony.
It seems that the Willcox HexFx GR55 would meet the most of my requirements. The ability to program strings individually for pitch and sound triggering is perhaps the most appealing aspect of this setup, and I could get some serious mileage from that.
The cost of this system is +/-2400 USD, and it does have a return policy if not satisfied. Not cheap, but readily available and checks the most boxes for me.
Ok....talk me out if the Willcox HexFx.