Some fishermen keep both feet on the pedals while fishing, even when not actively using the Drive. It's easy to get a little excited and press both feet against the pedals at the same time. According to Matt Miller, this can generate a lot of pressure and facilitate a cracked drivewell. So if you're not using the Drive while fishing, make sure your feet are off the pedals.
You can possibly reinforce the nose of the drivewell by applying some 3M Scotchweld 8010 NS. The 8010 bonds well with Polyethylene and the NS adds structure or body. It's not the cheapest or easiest to use but I've had great luck with it to reinforce the old cam column models. You can use the forum search feature to find tips on using it.