What exactly is meant by the phrase "soft spot" when referring to an estate pipe? What causes it, does it interfere with smoking the pipe, and is it something one should be concerned with? http://www.smokingpipes.com/pipes/estate/united-states/moreinfo.cfm?product_id=85420 This is a really good looking pipe. I doubt I'll get the money together for it while it's still available, but for a number of reasons I've lately become sold on the idea of estate pipes. Basically I'm wondering if this "soft spot" is a big enough issue that the $100+ price tag will be going towards strictly a collection item, or if this pipe should be a good, serviceable pipe.