Thank you, much appreciated. Wish i had it a bit sooner, would of figured out how to removed the center sections sooner, almost broke it before i figured out there was a screw beneath the cap, lol. Once I did, i was able to access the bottom freezer (CF) freezer and hopefully I found the cause, the heater coil was burnt on the bottom, presumably due to over icing of the coils or broken thermostat, as you can see in the photo.
I ordered the heater/evap. coil assembly as they do not sell the heater element separately and presumably not replaceable without replacing the entire assembly. I'm' not equipped or experienced in capturing or refilling freon, so i'm just going to attempt to swap out the new heater coil. I already removed the old one and the swap appears to be doable.
Good info on the manual, so will be easier to diagnose next time, thanks again.