Here's a list of leaks I fixed on a H29.5.
The rubrail was the biggest culprit.
Remove water heater and test for leaks
Clean up water heater deck, Bondo, spray paint
Order new water heater and replace.
Probe water tank for leaks at water heater
Remove rubrail calk with grout remover, sharp knife x 2
Remove interior boards to water tank and tighten fittings
Reglue and paint V-berth headboard
Remove bimini hooks at aft, replace screws
Remove port stanchions and Bondo holes, then Lifeseal
Remove starboard stanchions and Lifeseal them
Screw down stanchions lightly to set, come back several hours
When rescrewing stanchions, use 3M remover to clean up now
Remove anchor locker hatch to take home.
White putting 3 holes of anchor locker opening
Bondo anchor latch hole for tighter seal
Clear calk 15 holes of anchor locker hinge, screws
Clear calk freshwater seal and anchor hatch metal
Unscrew 2 U-bolts anchor locker & bow, clear calk and tighten
Put cork in air vent to partially block bacspray of water
Clear calk around mid-ship hatch, screw too
Examine 2 hatches to re-calk and re-rim calk into screws
Recalk rubrail wtih clear LifeSeal use red guide • clean as you go paper towels • leave fine smear
Clean up white Lifeseal overspill at starboard windows
Recalk windshield & port window clean MEK • tape off • LifeSeal clear • red guide stick
Recalk all 3 plastic water exits when re-attaching
Grout out and recalk bowsprit plate