No, I'm not left handed, I'm telling this because of Norbi's video, it seems he pinches with the right hand...
when i do mini-g i use magic knot to enter, but i have i pretty big problem(that is almost gone) i consistantly hit my finger so hard that ive broken it bfore, and im trying to figure out how not to. i can avoid hitting my hands more often now, but i still do sometimes.
You'll have to be a bit more specific as in where in the trick does the stick hit your finger? After you've caught the diabolo (seems most likely to me)? The solution could be the same as I already posted a few posts back. Reserve a bit more string for the mini-g The longer the string, the less speed the stick has when you try to catch it.