As I'm still not sure, I've bought a used Dual 150 from eBay so I'll have both to play with and see what happens

First post so please be gentle... I ended up here after watching this Fortnine youtube video in which Harry's Lap Timer is used in conjunction with the Dual external sensor to record his friction circle/g-g chart https://youtu.be/LW6lMIdy73k Clearly there's no need for me to want to do this with my ...