Hey W8,
The problem with the pushbuttons is normal. There is a fix for it, strapping a diode across the terminals of the relay box under the dash. When the relays switch 12vdc to a coil like a horn or a bilge pump, a magnetic field develops. When switched off, the collapsing field causes a voltage spike that causes the state of the relays in the box to flip flop. I just live with it, can't be bothered! Tell you what, I will do the mod on my boat and take some pics for you guys. It's no big deal.
As for the tower issues, the site (world!) expert on Epic Tower anomalies would be Derek (Gr8dna) who will chime in............