Thanks. Have not heard of problems with the adjusters other they can get stuck, which usually can be fixed by shocking them with voltage. They are expensive. Suppose there was some efficiency with the current layout , but seems the camshaft chains, sensors could have been on the front of the block mirror image except chain would form a V with a gear on front of crankshaft. Could change the evaporative system with two small centrifuges one on front of block and one on the back over the chains. Wishful thinking. I plan on doing the chain once, problem returns will drive until it won't.Adjusters would have cost me a lot more. When you buy a kit it's chains and guides so we were always going to do that. We then replaced the sprockets that showed signs of wear.