Here is one of the side support blocks, with the new groove plowed in it (far left groove) and the old groove 'fixed'(Lighter colored in the center). On the right is a hand chiseled notch in the front of the block so that the seat can not slide back once it is opened up. The bottom of the notch aligns with the front corner of the block and goes back about 7/16 of an inch. Basically we gave the 3/8 inch rod a 1/16 of an inch clearance.

we also added a block on top of these to fill in under the aluminum brackets, you can see this in the following pictures.