Replaced old, small mounting plates with custom-made plates. They are based off Reico-Titan mounting jacks, so that in future I can buy a set and slap on there. Old jacks still work, just are very heavy and difficult to maneuver. The mounts are 1/4" steel, and extend entirely under the horizontal wood of the Alaskan bottom. The holes behind the mount are pass-throughs from the inside, covered by an interior board. This wood on this lower half is extraordinarily preserved, but still, the more spead-out the jack load, the better. Lastly: 3/8" matching plates on the inside are used as the backing plate for each mount's bolt. This design basically makes a metal/wood/metal sandwich.