Has anyone tried upgrading A6 low/high/fog beam bulbs? Its a 97, which means it has the same PES (Poly-ellipsoid system) projector lamps as the S4/S6 models. I looked at the rear of the lamp assembly and don't see a lot of metal to act as a heat sink. The factory 55w bulbs are a little feeble and the next level up is 85w. TIA, Doug Miller