I appreciate the conversation and your time! Here is what I theorize.......
White smoke when cold is normal for “Old School” diesels. My 07 Dodge would puff when it was cold but because it had an ECM, it would correct the rich and stop. Part of the correction was the ‘hair drier’ would cycle on and off below 1500 rpm until the engine warmed up. The lovely sweet smell of rich diesel is just part of the package. As you surmised in another post, it is all a product of too rich for the cylinder temp. My guess is that your first tune was an off-road, generic tune with no cold start correction. Did you tend to “Roll Some Coal” when you jumped on it? I also guess that it had all the codes to turn off anything having to do with the DPF/DEF system. I am wondering if the next two tunes you had were written for trucks with their emissions systems intact. This might explain the lack of smoke and the messages. As the EPA is supposedly cracking down on these sins of omission, I suspect more tuning is down systems intact. This isn’t all bad in my opinion as it makes it harder for manufactures to argue that vehicles were over tuned. I have thought about going down this road but I would settle for a simple remap that gets me 50-75 more pounds of torque,15% more mpg and control over the regens.