A number of original posters have questions in here that others have
replied to, but they have not followed up. Novices give up when the
going gets a bit tough. Those who want to advance keep working on it.
Everyone I've met who gives replies in here has a desire to help
others, so their advice is virtually always well-intentioned and
well-considered, and often error-checked. As a general rule, if
someone is working with you, reply to them, even if it's a matter of
courtesy to thank them when you've been helped by their advice. TIA,
James