Great start Mark. You've got all the technicals sorted as Dave says but that one needs 20+ hours of integration of your best subs to get "all" of it. Indeed as Stephane wisely points out we can be our own worst critic. If you have a go at one that needs far less integration you will see, I'm sure, you have a solid grasp. Have a squiz at Stephane's or Alex's Orion, I'm sure you can give us another to call WOW
