I'm kinda on the skinny side and have always found weight belts (webbing or rubber) a pain in the ass. Since I don't have much in the way of hips, my belt tends to slip and spin...frustrating. Anyway, I was thinking of buying a weight vest and was wondering if you guys have any suggestions/advice? I was considering either the widget made by Seasoft: Seasoft Free-diving vest from LeisurePro.com or the Beuchat 7 Kg Harness. 