I'm gonna show you how to fix your broken pads with an US penny.
Once you start playing Hard and Expert on drums, you're gonna have to do a lot of rolls. It might not be until then that you realize your drums are effed, and the drums aren't picking up notes that they should.
The best way to test if you have a problem is to go into practice mode, choose "Won't Get Fooled Again" (loop the Organ Solo) and then choose 90% (so you don't have to listen to the organ solo loop 50 times!)
I decided to pry around and look for a solution, and I found one.
This may not work for all versions of the drumset. If the pads have foam on the underside of them, along with an orange mechanism with a spring in the center, then you have the version I'm talking about. Here's what it looks like with the green pad pulled off:
http://img530.imageshack.us/img530/8...rumfix1xu1.jpg
That orange mechanism you see there is screwed into the underside of the pad. This orange mechanism has a spring attached - this spring is pinned against the drum pad's contact sensor. If you remove the orange mechanism w/spring by unscrewing it with a Philips head screwdriver, you will reveal the sensor. Pull the sensor up and you will see a rubber pad either attached to the sensor or laying in the sensor tray.
http://img264.imageshack.us/img264/2...rumfix2kr2.jpg
What is this rubber pad for? Well, it serves 2 purposes.
1.) It absorbs the shock of other pad hits. Without these rubber pads, you could hit the red pad and have it register for both red and yellow.
2.) It helps to create more tension on the spring, thus putting more tension on the sensor (making it more sensitive).
From what I saw, there is 1 rubber pad for the red and green drums, and 2 rubber pads for the yellow and blue drums. This is because yellow and blue are adjacent to 2 drum pads and thus, need to be able to absorb twice the shock.
I originally experimented with relocating rubber pads from some drum pads to others - this was met with mixed results. Then I found the solution: a good old American penny. If you swap the rubber pad from the red or green drum out for a penny, you can improve the sensitivity of your drum to rolls. Doing this will result in a piece of metal touching the metallic sensor, leading to more vibrations being picked up. This, in turn leads to more sensitivity and better pick up on fast notes.
http://img413.imageshack.us/img413/5...rumfix3vk7.jpg
So yeah. Once you have that in place, place the orange mechanism w/spring back on and screw it in very tightly. Test out your drum to make sure it works like you want. If you find other drums are registering, put the rubber pad you removed underneath the penny.
Alternatively, if this solution doesn't help, you can fool around with the contact sensor to make sure it is well placed in the tray. Or you can fool around with the orange mechanism w/spring to make sure it is pushing on the right part of the sensor - and that the springs are very tight.
Hopefully, this will help you guys out.