What mast plate? The base of the mast has a foot (cast alum fitting) that hinges to the shoe (cast alum bolted on deck) any real issues for those lemme no, I can help. I can machine or weld that thing into next year.
Deck soft spot, estimate?
Resin hardner and glass fabric $150.00
Hours of labor 20-30 (done at home)
Lessons learned: Priceless
Really a lame ass answer I know..(justification coming) I'm a hands on guy so I would do it m'self if at all capable and think you should do the same. It gives you more time w/boat.
Wayne repaired his foredeck as did Roberto. Wayne did a "neat' repair I think via liquid impreg. Roberto removed the fordeck from the inside replaced w/ plywood and reglassed (upside down) using boards to prop up repair and backer plate.