Well it seems like you can ask him directly. I feel like a dummy a bit because I published this thread and learned AFTER about the following thread where Mr. Harrison is discussing directly with fans.
I always find it hard to break down your double stroke technique. I know you use a lot of wrist around the kit, fingers for fast single strokes, more wrist for ghost notes and thumb-index pinching for snare buzz, but when i slow down your doubles i see hardly any finger control. Do you play...www.drummerworld.com
Hahaha yes! He's always super quick to reply to my super annoying questions