Them 12's must be super tall on lowest setting. I got 3's and 6's. I,m beginning to not thrust those prunny littles 3's.
I have 2500HD 4X4 that has failed every fluid carrying line on the undercarriage. I have to get it jacked VERY high to replace all of the fuel lines ( already replaced all of the brake, tranny cooler and engine oil cooler lines). It hasn't popped a washer fluid line yet, but that's coming. Those 12K stands are the most robust stands I have ever owned. I feel as you do in regards to the 3K stands.