Let me add this little piece of advice in here for all you potential DID or rebuildable buyers. You must, and I have to stress this, MUST have a device that can test the ohm rating of your coil as well as be protected against shorts. As with any rebuildable, there will be shorts and hot-spots to deal with and if you have an unprotected mechanical device, you're just asking for potential trouble.
In other words, purchase of new vv/ohm reading device is entirely justified in this instance