I previously used NBoKC (saw the recommendations here) and everything was super easy.
Like Hindsight said, you will just have to give LESs and several years of history. Also, if needed, you can get your commander to write a letter saying you have xx amount of drills, xx amount of FTPs, AT days, etc and at 1LT pay, you will be guaranteed to make xx dollars. It may take a little more effort for part-timers to get it done, but it happens all the time.