Iluvpints Welcome to Bodojo you're bound to get the answers you seek here. When it comes to top end playing its all about application and perseverance.
My approach to this style was to concentrate on getting each beat to count and sound crisp. The grip is such that the
Tipper acts like a pendulum and it is that which helps the with speed aspect. I would concentrate on getting up to speed and letting the rolls and triplets occur naturally. It is demanding & requires a fair amount of practice. I've found triplets & rolls on the upstroke came a lot easier. Also pay attention to how far from the skin you hold the tipper a lot of the time you can make it work for you by dragging it across the skin making additional beats/rolls without you having to move your wrist at all.
I spent a lot of time on this style ending up with quite a serious RSI. So warming up is important as is warming down afterwards. A few gentle stretches of the hands wrist and arm. I tend to add bits of it to my playing but I could co with getting in some practice time to refresh myself.
If you approach it that speed, grip & tipper position are the main facets, you should begin to see results. Variations in stroke will come once you've got the beats happening & sounding crisp & clear. That's when the work begins, fitting it into the music.
Think of it as similar to Kerry style, you try for ages to get triplets & rolls happening and then you can't stop them! You'll get it, and then it becomes about controlling it rather than it controlling you.
I'm certain others on site will jump in with their experience and knowledge so it wont be long before you have top-end as an additional tool in your playing style
Remember, WARM UP/WARM Down!
Have a look at Paul's Top-end demo, link below, good luck & let us know how you get on.
Mike
http://www.bodojo.com/top_end.html