Copperband Butterfly Feeding Device

[epsteino]

Going on my second Copperband due to the first one not taking clams/mussels on the half shell, and the other feeding device being ignored completely, I figured I would make a DIY feeding device that's effective and almost guaranteed to have them feeding.


Materials:

(1) 3/4" PVC Socket Cap
(1) 3/4" PVC Hex Plug
(2) Rare Earth Magnets (Coin sized or smaller)
(1) Felt
(1) Coral Target Feeder bought from eBay - http://www.ebay.com/itm/The-Coral-R...736719?hash=item3f4cf0000f:g:p3UAAOSwq7JT8vyy

Tools:
Scissors
3/16" Drill Bit
Chamfer/Deburr Tool
Carbide Ball End Bit
Carbide Cylinder End Bit

Really cool. Have my CBB for a couple months now. He does eat spirulina brine and clams which is great but my other aggressive fish get to the food first. My question is how do you smooth out the holes so they don’t have sharp edges ? The countersinks I have are rough.