I have an outstanding record. How do I get my 1SG to send me to BLC?

I am a 19D with 32 months TIG/ 32 months TIS as a specialist. I won the draper armor leadership training award in OSUT, won the soldier of the month board while my unit was at NTC. I have attended unit armorers course, resiliency training assistant course, bus driver school and stryker school, have maxed out my correspondence course hrs, have a four year bachelors degree, score 38+ on weapons qual, and a 240 on my pt test. I finished SSD1 the weekend I arrived at my duty station from OSUT two years ago. My last five first line supervisors recommended I go to the E5 Board and also BLC, as well as 2 Platoon leaders and 2 Platoon sergeants.
My window for reenlistment came up recently, and I decided that I wanted to reclass to 35L (which is a SMAPP program MOS). I was told that I needed BLC before submitting my reclassification packet. When my current 1SG was told this, he stated that he "wanted to see more out of me" and did not elaborate on the subject. I am never late, know my job better than some NCOs in my troop, and have never been a recipient of negative action. Has anyone ever encountered something like this? How exactly can I improve when I already work my ass off? Could this be due to the fact that I serve as the troop armorer?