Is it just me, or is it normal that i have to sand down the ends of the blades on the Axe Ez whenever i replace them. It seems that whenever i put new blades on, or even blade grips...they tend to bind when i move them left or right. Is this an issue, or does it not matter? When i replace the blades, i tighten the screw all the way, then back it off until the blades move....i swear that everytime i replace the blades, they move decent until about 30 degrees then bind.