Please critique my home front-end alignment method

I don't have a way to know how many degrees I'm turning the wheels. That's why I'm just going full lock and comparing the two directions. From what I've read on here, if I understand correctly, I can't get too much caster with factory arms so I'm just doing this in an attempt to make both sides equal.
Of course you do. You have a means of measuring a right angle, don't you? Half of that is 45 and half of that is 22 1/2* which is close enough.