The door mirrors that were on the truck when I bought it were cheap aftermarkets, that had been re-drilled to move the heads on the arms. But they drifted even below legal speeds, and required constant re-aiming.

So I bought some new ones, knowing that they'd have similar problems, but hoping for an improvement. It was very slight - they'd hold at low speed, but drift at highway speeds.

Later, I swapped again:

Owner caption April 2022 · Photo 116 of 121