Building an Eastport Pram.

The kit includes some short wood screws to attach the gudgeons for the rudder assembly to the back of the transom.  This strikes me as insufficient for a section of the boat that is going to be under water and under constant load.

Shouldn't the gudgeon hardware be held on with through bolts and nylock nuts on the inside.  For that matter, shouldn't those holes be overdrilled, filled with epoxy and redrilled?

Is it really sufficient to just use the included screws?