Dave,
Iv'e downloaded, "the thing" onto my PC and transferred it to a Palm PDA, very useful. However, I was wondering /ubbthreads/images/graemlins/grin.gif If I zeroed on my range at 400ft above sea level, and then went hunting at say 1200 ft above sea level, would my shots fall high (or low) if I used "the thing" on my PDA with my rangefinder as there doesn't seem to be anywhere on the programme to save your zeroed altitude and change it to another altitude when at another level. Does this question make sense? /ubbthreads/images/graemlins/grin.gif