ED is optimal for tren A. Less sides and stable blood levels. It makes it work better.
If this is your first time with tren, try 37.5mg for a couple of weeks and see how you react.
USP is the Ulter Slin Pin method (This was tought to many on another board by Ulter, I in no way discovered this or made it up on my own). You take your normal syringe full of gear and then you pull the plunger out of a slin pin and inject the tren (that is in your 3cc syringe into the opening at the top of the slin pin. Carefully put the plunger back into the slin pin and turn upside down. Let the air travel to the top of the pin (towards the needle, as you are holding this upside down) and push the air out by pushing up on the plunger. Once all of the air is removed then inject. It takes a little bit to get used to but it works and it works well.
If you can't remember to pin ED or take aromasin, maybe use something else?