Down here in Phoenix we get hot weather along with clear skies. I have been flying my RV-12 #120330 in the summer an notice the need to be very careful to avoid going into the yellow range at 230 degrees plus. I know another RV-12 owner on the field has modified his lower cowling to move the oil cooler forward about an inch, which apparently avoids the overheating according to him. I've asked an S-LSA RV-12 owner about this over heating and been told that his plane does not go within 20 degrees of the yellow. Anyone have some comment on whether the re-positioning of the oil cooler is a good, best solution? Mark