Don't know how many hours you have used your 2000 drive on your Santana, but I have some doubt about its longevity on that size boat. The little recirculating ball "nut" that actually drives the shaft in and out is pretty small, even on the ST4000 that I have on this boat, and ours has failed twice now. We only use it in mild conditions (there is a larger pilot for stronger winds and seas, but it draws a lot of power), and still it has karked.
If this pilot is your primary means of self steering
I would suggest a considerably more robust drive to go along with the new electronics
Oh... in their usual non-cooperative way, Raymarine
refuse to sell the replacement "nut" as a separate part. One must buy the whole drive unit. Grump.