It doesn't need to go out on the road, Nick does all the logging in the comfort of the building then checks through them afterwards
The only time mine went out on the road was afterwards and I came back with a nice big grin on my face

225bhp and 256lb/ft, now fitted a sports cat instead of the decat and FMIC, got Calibra injectors to go in as well as a VR6 MAF, hoping for 240bhp+ next time
It's a long drive (2hours +) for me to get up to them but it's worth it