Still have a pile of notch coils. I used them rebuilding my stock Cleito coils. They worked very well because of the high height of the cleitos. They also fit in stock Atlantis, Hercules, Melo ECT coils. I only used them as vertical coils. Air through the middle and wick around the outside. Have moved to single coil rebuildables tanks and have not found a use for the rest of them I have. Yes have to be careful with the legs. Will use them up some day as I used to love them as it saved a bunch of time not having to wrap coils to rebuild. But they are not cheap anymore to buy like they were a couple years ago. CHEERS!