There were 2 3d printed prototypes 20 plastic versions that were unmarked, the longer ones. Then i made the 50 of the shorter black aluminum ones that are numbered, "the ones you guys are using" and now have another 50 of those but in 4 colors. #0050 will be the last of the official first batch of Centri's. I think i said i had 6 left but i have 7 actually. #43,45,46,47,48,49,50 IMAG0538.jpg<--- Thats the last of the first batch, they make me proud...