On Tue, 15 Jan 2013 11:33:14 -0800 (PST), DerbyDad03
wrote:

So, here you go...have at it.

http://i440.photobucket.com/albums/q...8276203311.jpg

P.S. I've tried a little vegetable oil on the fins to make them
slippery and while that works to a certain degree, it's not something
I want to do everytime we use the blender.

I have not clue how to modify the cover...

First thing I thought was to use food-grade silicone grease; like
plumbers use, but not very often. Would it soften the rib rings?