Clipper Blade Questions

I was watching the Kirk Stierwalt clipping video, and he uses what he refers to as a "bevel blade" on his Andis 2 speed clippers for clipping the neck.  Is a "bevel blade" the same as a medium blending blade? 

Additionally, he also uses a 3115 blade on his Andis Progress clippers.  Does a 3115 blade fit on all flathead clippers?  I have a pair of flatheads from the beginning of time, so I'm not sure whether this blade will work for me.

Finally, how does the OA/FD blade work?  Is it a back dragging blade, or is it a regular blade that is pressed flat against the skin?

Thanks.

I saw him at a clinic one time and he only uses a medium, T84, and 5/8 on the neck. I'm almost positive he would be referring to a medium.

I'm not sure what a 3115 fits, but a 10 blade for Andis 2 speeds cuts the same.

An OA F/D is a free hand fine tuning blade. I wouldn't recommend back dragging or pressing it flat against the skin unless you want to take all the hair off. 

Here's Kirk's Email address. He is pretty good about answering questions.

[email protected] <[email protected]>