Hi Paul and welcome. You've been around for a few months I notice, and taken advantage of some LOVELY blanks in the buy/sell section. Great looking pen by the way.
The answer to your question about editing is that the system gives you 15 minutes. After that, your post is set in tablets of stone - either that or you have to bung me or one of the the mods an enormous bribe.
Looking forward to getting to know you and seeing more of your work.