Sorry if this has been done to death before, but I did a search and couldn't bring anything up on it. Has anyone tried the custom 823 with the flex mod? I've seen them for sale on ebay and they tend to be the same price as the normal ones. The mod looks like it is the same as that recommended for the Noodler's Ahab, done with a dremel. If anyone has tried it I would appreciate hearing of your experience and possibly some writing samples if possible.