Sorry for the delay in my reply, Not at this time but fully intend to do so by 2015/2016. It just bothered me having had green card for so long that all of that time, payment into social security etc would count for nothing. Thanks for your offer of private email as well.
Thanks for very useful information. The main goal is to avoid any delay upon entry as my husband couldn't take the stress nor my in laws as they are elderly. I really had not thought but do especially appreciate the link re proving ties outside of the US, hadn't heard of it before you mentioned it or even occurred to me! Easy enough as our daughter is still in high school and she will finish late Spring 2016 as she makes plans for college in the US.
FYI .have you heard of anyone gaining entry without giving up their green card? Probably years ago maybe,it is with a heavy heart that I do so, esp incurring new filing fees but value your expertise. Thanks again