Mikey,
The important thing is that you like the results that you have been getting. It doesn't have to be a true Lehmann NY style. However, if you become hooked on pizza making, you might consider getting a digital scale, if only to increase the chances of getting a consistent product, whether it is a Lehmann NY style or some other style, even your own "interpretation" of the Lehmann NY style.
As far as my pizzas are concerned, I tend to jump around a lot and do a lot of experimenting, so I am never quite sure what I am going to end up with and how they will taste until I pull the pizzas from my oven. Even my Lehmann pizzas are all over the lot, as you can see from the Lehmann Roadmap at
http://www.pizzamaking.com/forum/index.php/topic,1453.msg13193.html#msg13193. Fortunately, it is hard to do much damage to the Lehmann dough formulation if you stay close to it.
Peter