Thirty minute will be fine. WHatever your local hobby store sells will be good. Anything 20 min or 30 min. You just don't want to use 5 min, becuase the nature of 5 min, it's a lot thicker. 20 or 30 is thin comparatively. Stock up on 5 and 20 or 30 min. You should always have this on hand anyway for any number of things. Email me some pics and I'll walk you through every step in email, or if you want to talk, I'm in a hotel in Florida right now with nothing better to do.