Definitely mate, it just takes time and some patience. IMO anyone can map for WOT but the refinement takes time. My car is cruising really well, smoothy no missfires no jurkey power delivery etc, could be a little leaner but its getting there. It idles well without an idle control valve now should be even better with one.
Once the maps sorted i'll probably change injectors (and steal Karlos's base map
)and start all over again
but then its time to sort out the starting. The car always starts but i haven't bothered to make it start well (this should be done last any how) as i don't have an idle valve yet which will help with cold starting with no throttle.
I found mapping the car to its current state really easy, a good base map really helps, the final tuning will however be done on a dyno.
But yes, as long as you spend the time the reward will be a car that drives really well, and really reliably.