my custom shop shifts with temp, lucklily though its very predicable, so 3 temp strips across the end has seen my scores improve since fitting them. The problem was the scope would cool down from the car to the early morning zero session, and then rise as the day's temp rose...at ottmoor it saw a shift from 20 deg to 3 deg back up to 9 deg, which equated to 0 click offset, to 10 clicks, back to 7 clicks...but i could see that with the strips, so it wasnt a problem, where as it plagued me at the sywell GP and a number of other days where there was a shift during the shoot.