Well, let's see how long you stay in business when you do not take care of your customers. Doing the right thing or going that extra mile makes all the difference in the world in the eyes of customers.
The flip side of that coin is lets see how long you stay in business when you cater to every customers demands. Heres whats wrong with the LGS working on that gun: 1) Manufacturer could void the warranty due to unauthorized repairs. 2) If the problem comes back guess who is going to be expected to fix it every time? The LGS. Hes become married to that customer and not in the way he should be. Do you know why most LGS have smiths? To make extra money. Now you can't make extra money because you have to tinker with a new gun whose responsibility to fix isnt yours but the manufacturers.
Can't have it both ways. Can't want everything done for you and expect LGS to keep the doors open.