Actually I have a set-up that I will sell you. Its like a stop watch but its attached to the sled with velcro and it has a photo eye which reflects off of reflectors as you pass them, so you can put them anywhere you want......... 60ft, 100ft, 500ft, 660ft where ever you want it will pick them up. It will do as many as you want all it one run. Let me know...MxZ670H.O. said: