Fatdoggy....I have found that the face of the brush on some of the 4505's isnt quit straight....So it only wears on part of the brush. I have been just barely hitting them on a serrator and getting the face good and straight (top to bottom) and then breaking them in for 300 seconds and checking them. They have been really really good like this. But the key is to get the face straight.
The new ROAR Binary stock seems to be really good so far. Ive done no track testing yet but on the dyno (although we dont race the dyno's!) they appear to be better than the Monsters.
EA