Originally Posted by jeff00seattle
Jeff, if it were mine I'd avoid the metal u-channel. So far what you've done looks good. If the existing plastic T-molding is still good I'd reuse it along with your current hinges as those items match the rest of the interior build.
There are many ways to help strengthen the hinge mounting location, here are a few;
1) Fill the channel, where the screws will go, the same way you already repaired the cabinet side (looks like you added wood glue and sawdust?).
2) Fill the channel with a thin slice of wood and glue it in.
3) Drill out a hole that you can then glue a dowel in and counter drill the dowel to accept the hinge screws.
4) Longer screws are also always an option to try
Any of the above suggestions will require that you remove the corresponding "toothed" portion of the t-moulding so it will lay flat. You should also take care in drilling the new pilot holes for the hinge screws because your fill will probably be harder than the surrounding particle board and the drill bit will try to wonder into the softer material.
Again feel free to DM me with your number if you'd like to talk.