I've always had trouble with the TLF clips... never seem to hold tight enough to keep the tangs from ripping the sheets out where they promptly end up rotting on an overflow or powerhead intake.
I made mine... if you hunt around, you can find the Zoomed Mag-Clip. They are about $5-7 or so. Take a regular ocean nutrition feeding clip, pull off the suction cup, and mount it on the magnet.
I agree 100% with the intent though... I'll never go back to suction cups... never.