I guess the stock Solo cube uses the same buffers/level converters as Green Cube / Pixhawk etc, so it should be a matter of cutting some traces and applying 5v to their external side, to make PWM go 5v - thus solving the worst problem.
Does the community have the stock Solo's schematics/PCB layouts ? - it would be a fun micro-soldering exercise to fix them.
Does the community have the stock Solo's schematics/PCB layouts ? - it would be a fun micro-soldering exercise to fix them.