old style cannon swivel base to new swivel pedestal?

[Gator]

We have two old style high cannon swivel base mounts that I'd like to upgrade to new aluminum pedestal swivel mounts...it looks like the mounting pattern is different, though, and I'd rather not have to drill more holes in the fiberglass where we need to mount the riggers. Do they make a deck plate to convert the old mounts to the new type? The new ones appear to be able to be used either fixed or track mounted, so the base must be a rectangle (likely 4x3), while the old bases were perfect squares (4x4). Any suggestions? Thanks.

Gator

[LongLine]

Not the exact same situation but similar. Buy some 1/2" aluminum plate. Drill it to fit the pattern (in the boat) then drill and tap it to fit the bases. Use flathead s/s screws so bases would sit flush to them. Bases screw to the plate & not the boat/board. (There may be a picture in the article I wrote, way back when)

Tom B.

(LongLine)