I bought the plx m300 and it is pretty easy to use but I was wondering if anyone has used some sort of software to datalog the m300 unit. It would be so much easier if I could use the 5v output on the m300 to hook up to some sort of logger that I can read rmp verse A/F ratio. I am really looking for some way to hook these signals up to my laptop to make it really easy to read but any kind of cheap logger I could use on my honda to help me tune would be great. I would really like to be able to hook up two 5v signals (rmp and WB out) and datalog them on a computer and do it that way if I can if any knows a way to wire and a program to use. Thanks.