Scott. I use the helper tray method. I get a much more even development that way with less developer.But either way will work well. Don't toss your developer. Filter it back into a used developer bottle. When you mix a new batch then add some of the used to the new. For instance if you're using 100ml of developer to develop a plate then use 70ml of new and 30 ml of used. It can even be 50/50 what ever you decide. The idea is that some of the silver in the used developer helps give you better development.