Hi JNCT14,
Food for thought....Maybe you and several others who have much more experience than myself, could conglomerate your ideas, seek manufacturers of sewing machines, and give them food for thought with improvements to better their machines. Improvements, and ease for users, of their products results in more sales; and more satisfied customers, who by word of mouth cause more sales, and even more satisfied customers. Most manufacturers usually reward their source for their information of improvement ideas. However, you may need to go through a lawyer just to make sure your ideas, if ever used, you will indeed be compensated for your creativity.