After years and years of eating consistently like you are trying to do now, let me tell you that it will get easier to do as time passes. At first, I felt full all of the time. Now, if I don't eat at the 2 - 2.5 hr mark, I feel like I'm starving. You will get used to it but you have to keep the cals high, esp. given your metabolism.
You've got a great base to work with (I took a peek at your posted pics) so keep up the good work.

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