280 K plane install on Formula 312
 

Any one had experience with installing 280 K planes on a twin engine Formula or other brand with the twin engines in the boat. Is it possible?? Boat originally came with small Bennetts. Tabs are Mayfair Electronic Trim Tabs from Hardin Marine PN 137-8114-28 and Model MH380ESX.
Also the K planes are Hardin Marine with electronic sensors which Hardin Marine have told me that the signal is 0-5 volt and there are three wires coming from the cylinder which are Red, White , and Black. Has anyone found indicators that will work with this signal which are not LED??
Thanks in advance.