Scalextric digital was the way to go because simply of availability and also because it allowed me to fitt a bit of lenght onto my permanent layout (~45m). Using a track designer (Ultimate Racer 3.0) you can play around and see what you will get. With the excellent PB-Pro 1.8 SH plenty of ower is available for any number of cars. Using SSD Console by Any Wallace you can see all your mods and results on a screen, you can record and playback your pace cars (in case you are a "lonely" racer - as I am). The soon to be released upgrade will even playback lanechanges. Endless possibilities on the horizon.........