Originally Posted by huntsman22
Originally Posted by Axtell
Its not an opinion its science.


Yes. It's science, if you say so. IF a guy wants to believe that little chineezy bubble levels have any kind of accuracy.

It is also science, that those that can't, quote and copy those who can......



Obviously you do not know what/why they are used for or how to set one up .
You can google it or remain ignorant, its all about choices.