definitely go with bigger rings and swivels if your gonna go with spro..........
i was using their 130# test regular swivels and ball-bearing swivels and was breaking those skinny rings just by pulling my knots tight using 50# test mono
of course i mighta had a bad batch but at their pricing it turned me off of spro....... i'll prolly be using bulkier sampo swivels from here-on-out
i don't like the looks of aussie style wind-on swivels but i have used'em w/o any problems breaking knots even though it looks like they have a sharp edge on the outer ends........... and i don't think they swivel as freely as standard ball bearing swivels do under tension either