I may have been living in a cave lately with respect to rocketry but it seems like the stratologger CF are always out of stock. None of the vendors that used to carry them sell them anymore. Does Peter Lawall still own the company? He was super helpful to me when I got into high power. In fact He was one of the 2 guys that signed off on my level 2 way back in 2004 at LDRS in Geneseo NY. I did try to do a search on the forum but got nuthin. I think I have at least one of every generation of their altimeters including the one that took 2 batteries, and it still works!