Vex Pro 3 CIM Ball Shifter WCD 3rd Stage Kit with #35 Chain

[Amo10]

Currently, our drive is a 3 CIM Ball Shifter with a WCD 3rd Stage Kit with #25 chain. In the WCD part of the gearbox, we have 2 18 tooth #25 sprockets but we were wanting to switch to #35 chain. When looking at the CAD, it doesn't look possible to run 2 #35 12 tooth sprockets with the WCD addition because of the width and the chain will not fit. Are we missing something or is the only way to use #35 chain with the 3 CIM Ball Shifter WCD 3rd Stage Kit to have only 1 #35 sprocket in the WCD addition to the gearbox and place the gearbox at the end of the drive?