MBD is not reversable as far as I know. Is he crawling on his feet or elbows? Feed him more crickets and superworms to get his weight up. Keep up with the DARK veggies too. Kale, collared greens, all of the big leaf dark greens. Multivitamin and Calcium suppliments will be needed too. You've got the caresheets, so I won't go into husbandry. You probably need to keep him a little warmer than usual to get his metabolism up. Do not cool him down at night. Put a lid on the enclusore. The last thing this little guy needs is to get out and freeze.

I don't know exactly what information you're looking for, but send me a PM and I can help you.

Good Luck!
Jim Smith