hey guys, ive recently started to train jui jitsu and alot of grappling. all is good but im sick of the occasional knee to the groin or nutshot so im wondering what would be good for protection.. i recently bought these shorts ( http://www.shockdoctor.com/shop/product.php?productid=16149&cat=347&page=1 ) a size to small so im just wearing the shorts without the cup, should i just buy a size larger and hope it fits? im a pretty lanky guy (6'1 140 lbs.) so tell me what size to get also im trying to learn the damn leg triangle! ive gotten so many compliments about how flexible my legs are but it seems every time i try to set it up it just makes it easier for them to pass my guard. any tips on using my legs more effectively? so far my best sub is my arm triangle from the bottom and if that doesn't work, from there i just try to take my opponents back, which is pretty much my strategy from guard.