INCREDIBLE JOB, OP! Many congrats!
I haven't read 100% of the posts here, so forgive me if I'm repeating. From what I have read, the two main reasons for your success is your will power and intelligence. There are so many old, fat people who just don't understand what it takes to be committed to a weight-loss goal. You've obviously got this under control. Don't let anything deter you.
Now, if I may make a suggestion, start setting a new type of goal - weight lifting goals. Seriously, you've obviously got a large build through genes/conditioning/whatever, a great way to keep off the fat tissue would be to use that tendency to gain weight to make muscle. It looks like you're well aware you're going to have to transition at some point to more solid foods, so that will be the time to start looking at Body Fat % and gym goals as opposed to just losses on the scale.
Great job,
CK