HI all , got a cateye adventure comp for bike recently , not good with modern tec goodies so can anyone give a bit of info ? i set the altitude our house according to google earth , is this the only altitude i need to put in ? Also the temp reading does seem to vary a lot do i need to set something to right this ? I have read the instrustions but i think i must be a bit thick as i still cant seem to set the thing correctly , Speed distance and time i have done its just the rest Thanks Russ