I have some 27 and 29 gauge 1/2in syringes that I am going to be starting trt with. I am going to start using Nelson's shoulder technique. I would like to be able to inject in the glute as well using a 1 inch needle. I just don't know what supplies I need. I need someone in the know to tell me specifically what type of syringe and needles to get. I think what I need is a 21 gauge 1 inch to draw and a 25 gauge 1 inch to inject. What size syringe do I need? Will all needles fit all syringes or are there certain ones that only fit together. I know there are sites posted on this site to buy syringes/needles. I just don't know what I specifically need to buy. Thanks