I have a mefi 3 in my boat I use mefi burn tunerpro and I have some other flash ware that im using that's way quicker on the flash time on the mefi 3. TTSdata master also hooked me up with the windows 7 version licensed of the datalogger. Here is the thread on my build http://www.gearhead-efi.com/Fuel-Inj...EFI-tune/page2

PM me your email and I can send over the trial version of tts and some data logs.