Here is some info on amp stands, 1 person sent back a stand and "said they are not robust enough" At the Jam Wensday I set my steelking amp on the stand and had clyde take this picture, steelking 62lbs ernie 172lbs weight taken yesterday at the VA.
amp 62 ernie 172 234 lbs is there an amp heaver than this?
It would help if you could see it sitting on the floor without the pac-a-seat in the way. I don't need a stand but if you want to sell them they need to SEE it! That picture is blurry!
I have no idea what your stands look like but a few thoughts....
Robust can have a wide range of meanings, depends on the person and their past experience. Just because a stand can hold x amount of weight does not make it robust.
Use the knowledge gained from the return to advertise your product's features and strengths. Maybe there needs to be a design modification to your product to make it appear more robust.
Sometimes a returned product is much better for business than having to deal with a dissatisfied customer in the long run. If the return is handled correctly you may have lost a short term sale but prevented future damage to your business from a dissatisfied customer. A couple unhappy customers can do more damage to a business than a 100 good ones.