I have been trying to do exactly the same. I am a keys player but have to play bass to get gigs. My arthritis is getting worse so I augmented my 3/4 upright with a Kayla Ubass (great sound). But I can outplay almost any bass player when I am using keys for bass. I have Vortex and a Nanobass sound module. Vortex is smaller and lighter than elec.bass but Nanobass is limited and there are wires everywhere. I tried a Roland AX too big and sounds cheesey. Not looking for acid, disco, metal, synth sounds, just clean elec bass and upright. My quest continues.