@usaski1, What year is your boat? I upgraded my 07 MC to ZO, and had to swap out the ECM. I think the cost was around $800 more for the ECM. I've gotten a lot of usage from it during the last 2 years, so, I'm happy I "upgraded".
BTW, ZO (love 'em or hate 'em) did a brilliant move, business wise. They took out the company who owned the rights to Boat Speed Control systems, and cornered the market share all for themselves. While PP won't use these exact words, I'd call it a hostile takeover, well done.
On the other hand, I agree with Horton. BUT, if any business person was in ZO's shoes, they'd jump at the chance, to corner the market for themselves. It's all about $$$. It is what it is, and we're stuck with it.