hi all, i jus measured properly and my base girth is 6inch which is good only problem is my head girth is 4!!!!! mid shaft is 5, i dont get it what did i do wrong to make only lower shaft gains? can you guys please help me out i want upper shaft/ head girth badly, i started doing supra slammers i thought theyd help ive been doin them for about a month and havnt noticed any gains?? please help