I've finished the first few days of my routine, and my fears are already starting to crop up. It's the very same stuff that's stopped me before, and it's the reason I've only ever stuck with a routine for a month:

"Am I about to dedicate all this time, hard work and effort for nothing?"

The thing is, I'm almost certain I've gained minimally in length before, but because of the lack of accurate measurements, I'm not certain. But that's the whole point of what I'm doing, 16 months, no stopping no matter how little I gain. In all honesty, the worst that could happen is after the time's up nothing has changed, but I really want it to.

Anyway, I'm sticking with it. I am thinking about implementing some more girth exercises to my routine, and I'll start structuring a new routine before next month, but for now I'll stick with what I'm doing, and condition myself for further training.