Based on the pictures you've provided of your design in other thread, I think you could possibly save yourself a fair bit of weight and cost by using only two gearboxes, each with 2 CIMs installed on them. You can then transfer the power to 2 wheels from each gearbox via chain. In fact, you can even use the CIMple boxes provided in the KoP to do this and, with the right sprockets, have the ratios you want.
If you use a
12-tooth, double sprocket (provided in KoP) on the output shaft of the CIMple box and attach a
36-tooth sprocket to each wheel, you'll get a total ratio of 14.01:1.