I took a blue harbor freight caster an cut a pinch weld slot in it. Works like the hockey puck idea as both are made of similar material and are about the same size. Mississippi doesn't have a lot of hockey pucks even though we've had pro teams.
I don't care if anything I buy has certifications or not. When I go to a restaurant, all that matters is if the food tastes good. I don't need pesky certificate from the health department telling me what delicious is. If I have an operation, it's none of my business if the doctor is certified by...
I just noticed the Warrior 6 inch pads are listed for $2.09 on the HF website. While these are not the best, they are definitely worth this price. I wonder if there's a glitch.