Hi Rob. what do you mean it already is modular?
I started with a Cheyenne. Great design. The solution tank and recovery tank are separate. Every other porty out there the two tanks are usually attached and all the motors are located in the bottom half, ie Ninja. Real pain do work on if you have a full solution tank. The vacuum motors are attached to the bottom of the recovery, the pump and heater located at the bottom of the solution. With some fiddling around, take the hinge off the recovery, do some rewiring, you can pull the recovery tank off, then pick up the solution tank. Modular.
Hec, refit the recovery tank so the vac motors are on top, that opens up LOTS of room underneath for a bigger pump, ie the new Cat. ALso allows for bigger vac motors and better cooling.
did I just design a new porty??? Its wouldn't be unique, Cobra put vac motors on top. but it would work great!