Tried to pressure sell to one of my elderly neighbours a couple of months back. When I confronted salesman he was talking absolute rubbish he asked what did I know. I smiled.
My first ever mod to an escort mk2. Fitted MS705 which only gave you side light on/odd indication. Fitted relay so that indicators flashed instead so that looked like more expensive model.
Most takeovers we do we always to get into prog mode either by list of other engineer codes or default code procedure. We rarely ever do a full default. Once in give the system a full check and test. Why would you default whole system. Surely that caused more issues to customers like having to get fob back from delivery driver etc. If it ain't broke don't fix it.