jester. great install. i should have gone this reversible pump route as well.

you are almost home. the thru hulls seem scary but really are not. just as easy as that hole you cut in the locker divider. just get a hole saw slightly larger than the fitting. painters tape. go slow in reverse and presto. your done.

i had to drill 4 ballast holes in the hull and three heater holes. tip measue twice or three times.

other thoughts. you could wye vent them off the center drain thru hull (factory drilled g1) or tie into the ballast drain.