Okay, I have three different answers
! I e-mailed Mike of Mike's workshop and he said:
" Hi Paul,
That does not mean anything (
refering to the dimple). Never heard about it before.
The FD-TC stands up good against glue. The FD-UR has a tinny marking telling you that it is the top.
Two teeth down and one up, is the way to put it in the saw. Have good tension, good speed and low feed rate.
Blades have a burr on the right side, what makes them cut to the right, you have to move the wood, bottom end, some degree to the right, to stay on the line.
Mike"
I did what Rog said and I only noticed a slight difference, but one side felt a little rougher so I figured that was the right side and if I put that on the right, blade facing me, the dimple is at the bottom. The teeth are so small I really can't tell for sure on the two down/one up thing. Even under my magnifying light! Blind as a bat, now you wonder why I am even trying to scroll!
The way I put it in seemed to cut fine to me, maybe I will turn the blade over and see if I notice a difference.
GrayBeard has over 7000 posts, he must have been at this a while, I got to try what he says. GrayBeard, look at my avatar, you can't have a grayer beard than me!! Hey, I'm having fun!
Thanks guys, I appreciate the help.