The reason tools are required is so you can hold the cross you are tensioning in the bottom of the port. All you need is something about 1/2" thick to do that. I used a 3/8" ratchet extension at first.
String your racket with a 2 piece 50/50 pattern and you don't need anything but a stringer.
Everyone has the right to be stupid... it's just that some people abuse the privilege