OK - James, you inspired me to keep trying... And thanks for the tip. Every bit helps.
Marcel, OMG! You are so freakin' creative with those marbles! Now those are ORIGINAL! At least I sure haven't see that before. I've looked at my Dremel a hundred times and thought "one of these days I'm gonna try carving something into my glass...", but never did. Would never have done anything that awesome anyway.