Ken, the reason I make mine that way is so the pitcher can see the backside which helps them adjust. The front side is normally what the catcher sees which does the pitcher very little good except when the coach is there explaining it. But even the explanation goes further if the pitchers can see for themselves how the ball is oriented.
That one on top with the big dot looks like it would make a fine backside marking since it appears to be about 1 inch from the seam but make sure there is another big dot on the other side centered in the horseshoe that the catcher can see.
How have these been working out for you?