I'm reading post and forum everywhere since 3 days and I can't find the good answer, lol. 60/200/30 looks the most popular,. I may try this. I'm at stock now, 7/10/7 and I find a huge jump. I don't know why arm goes so loi in weight if heavier is better. I'm beginner in this. Should I change punch if I increase weight??(it is at 4 factory setting). Can it be more rough on mechanic and make it break more? That's my 7 years old boy rc and he like to move dirt at start!