OK I'm going to do that.
I see there are a variety of stems new or used . I think I will first get the seat height just right and then I will decide on the stem for me. I see that the length of the stems are not only different from the height but it is important to consider the length of the reach being shorter or longer . I guess I'm going to have to do some measuring of my torso, arms, and legs . Or is there an easier way from what I read about ?, I may seek the help of a shop. I am not very good with numbers,..... largely due to dyslexia.