My very rough guess for Series I controls is $6,600US, and for Series II, $7,200. But thats just a guess, and a very rough one. The actual cost may be a good bit higher with the labor involved in fitting the electronics to your Modulus. If your still considering it, give Val a call for a quote. The thickness of the body is an important consideration; compare the thickness of your Modulus with the thickness of your Series I. The electronics cavity needs to be that deep. And yes, there also needs to be enough room overall within the cavity; so compare the interior of your Series I's cavity with that of the Modulus.