I just purchased a shot timer in an effort to better simulate the IDPA shooting I'm trying to get better at. It is a "Special Pie M1A2" which advertises itself as having an airsoft mode. I have set it to that mode, and tried pretty much every combination of Filter and Sensitivity it offers and haven't been able to get it to pick up my shots. I've even tried holding it next to the gun in my off hand while firing with my strong hand, still won't work... The manual (Written in 'Chinglish' ) is far from clear about the settings... It was an Ebay purchase so I can probably enter a case and send it back, but I'd rather have it work for me. Does anyone use this model timer, and have any suggestions? Any alternatives that you can suggest that might work better?