Fyi TunerPro is not opensource, it's just free (or nag screen)
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I would not change out eproms on the road, that's just asking for trouble
. With Eprom's I highly suggest getting it dyno tuned. Also what logging software are you planning on using?
I've been spoiled by Nemu, I tend to forget the days of blind tuning with Nissan Data Scan and TunerPro. Don't get me wrong TunerPro is awesome, but without proper map tracing and AFR logging your blind tuning.