Hey theyungbuk,, Greetings from Vermont and welcome to the site....
I've rattled a few bucks in, but was curious to hear any advice on techniques.
If you've already been able to rattle in Bucks. I would go with your Technique You already know YOURS works !!!!
While you're rattling you can try different things on your own, that way you'll see what works best for you. the only
things you have to focus on are Volume (aggressiveness) and time (length of rattle)... That's what I think.... Good Luck..