3/16 7010 aka HYP rod good luck hahah just kidding I've never had a problem w /it just find your right temp.I have a 200d w/easy arc dial i'll run on 3rd gear (190)& 75- 80 to fill & cap & as far as running the rod, fast circles ,or side to side & long arc i don't hold rod to close. your 7010 & 8010 are real good about getting slag out & leave better looking caps when you've got wind blowing compared to 5p or 5p+ & as always practice makes perfect.