I dig American Head Charge a little bit, but my guitarist constantly gives him shit about it. Benji can play Satriani riffs out the ass, but he was in American Head Charge. I guess whatever sell.s
I am supposedly suppose to play on his solo album, but that was 2 years ago, so my guess is that it won't happen.
My best tip for gaining double bass strength is basically just play along with your favorite songs. That's all I ever did. I never did any outside practice of double bass by just doing 16th/32nd notes for a half ho0ur a day. I just put on my headphones and played along with Opeth, Dream Theater, Metallica, etc.
Gene Hoglan said it best in a recent video interview. Drumming is 90% mental and 10% physical. Once you gain coordination, you can do anything you wanna play as long as you can mentally play it. That's how I can play along with Strapping Young Lad.
So yeah, once you build up the double bass coordination, just play with all your favorite songs, it will become natural.