If it ain't tight – it ain't right: The first goal when applying submission is to your opponent. It's already difficult enough to apply a lock, don't make it more so by trying to apply it on a wildly twisting and turning opponent. Use the tightness of your hold to immobilize him. Once immobilized the next problem becomes slippage. You will need to set a lever and in order to break your opponent. If he begins slipping off the fulcrum this will become impossible. What make immobilization possible and slippage impossible is PHYSICAL TIGHTNESS. You will need a high degree of isometric tension around your opponents . to set that tension and position yourself appropriately is a big part of your future success or failure. You this first in passive drilling. Don't just repeatedly the move – with each repetition try to find the optimal position that maximizes and minimizes slippage whilst feeling for a sufficient degree of isometric muscular tension that does the job without exhausting you. Finding that physical and mechanical tightness is the key to progress in submission holds.