if you get both, contact Kazu at K1-racing in New Zealand, he can sell you a powerjet monitor cable which you wire into your carbs and plugs into the VM3/4 plug on the datalogger which then records when the powerjets turn on/off. Works wonders in combination with the det counter recording and overlaying the data to see if your powerjets cutoff needs changing or if the jets are the wrong size.
http://www.k1racingmoto.com/
also the laptimer plug on the HRC datalogger harness, uses a 5V trigger, so you can hook up a laptimer to it to record your laps. I managed to wire in the starlane ducati gps receiver into mine since it operates on 12V with a 5V trigger. Works great and makes it easy to read and split up my laps.
http://www.starlane.com/vedit/15/prodotti-specifici-modelli-moto.asp~idcat~82#1097
