Glad you guys are all safety conscious, and believe in systems redundancy. BTW, always ran 2 VHF's on my offshore boats, and two antennas.
I can walk you through a bilge pump setup on your rig if you'd like. I'd drive myself crazy with worry without them.
Those ball scupper work great, I couldn't be happier with them. i got a set of Seachoice ball scuppers from Cost Plus Marine. There located in Madeira beach. Its a small place but crams in tons of products and great prices.