I'll have to try and get back to you on most of your questions ... all valid points.
I can however give a short answer re oppies.... they suck!! Too cheap. Too long until expiry. For those reasons, I will get my maximum . And it will stink if the shortfall goes to opportunists e.g. E.H. - I have voiced this strongly to DR. The next month could result in lots of participants... or bugger all. It's certainly going to be interesting to watch.