no probs Rhys..
yep, the bumps will upset the AP a wee bit.. however, whichever road we use, the data as a comparative, will be excellent.
on a flat surface, the ap22 will read a figure you can take to the bank.
I will have the laptop too, so we can dump each run to the lappy, on monday I can graph the results and email them to each of us.
any non 172 mk2 owners coming, can you look up the Cd (Coeeficient of drag), and the weight of the car unladen. We can input these figues directly into the unit.
We can also do 1/4 mile timings if enough space
Joe.. Looking forward to meeting up tomorrow.