I would disagree about the wire spring for the trigger/bolt spring, at least the current designs, as they simply take a basically straight length of wire of exceedingly small cross sectional area and then flex it..it soon takes a set, and trigger and bolt become become mushy and sluggish, and crisp bolt return is the key to setting and keeping timing...the standard flat spring set-up can be extremely long-lived if done properly, just like the mainspring in a S&W/Colt or the loading gate interlock spring in a NMBH/Vaquero....as for a new product, I posted it already in another thread, an affordable Rodeo verion of the Sheriff's Model in .44Spl or .45Colt....