Okay Dave. I'm obviously a bit less advanced than you at this CCM stuff. So do I have this straight?
Charger was N/G, so you cooked that battery @ 40 amps for at least an hour to get it back up, right? You still have the same symptoms, no crank, but lights & everything else is okay?
I going to say unequivocally that I've seen more times than not an LT5 will not crank if it is powered by a less than 95% battery. I'm going to apologize again for asking that you're sure that this battery would/did pass a load test? It's not just about voltage for our system, the "system" light will flash if the battery voltage drops below 12v(?). I'm not sure about the exact number. I also know that an LT5 will not crank well or at all with a battery @ 12v and either a shorted cell or low amps due to bad electrolyte. I know I sound like a broken record here, sorry. I just don't want to see a brother tear out a CCM only to find that was not the cause.
Personally I hate trickle chargers as they just boil the electrolyte and make it useless. If I had power in my garage space I'd be tempted to get on of those C-Teck chargers, maybe.
Tom