Gary,
I believe that things must have changed since you had your FFL. You can denote personal firearms seperate from business ones by tagging them and keeping a seperate bound book for personal firearms. This tagging and bound book requirements only apply if you store your personal firearms at your place of business. If you don't use your FFL when buying and selling firearms from your personal collection you are a considered a non-licensee for those transactions. However if you devote time, attention, and labor...regular course of business, livelihood and profit, yada yada then you're running afoul of your "gunsmithing only" 01.
The short version from the BATFE FAQs page: A licensee may sell a firearm from his or her personal collection, subject only to the restrictions on firearm sales by unlicensed persons, provided the firearm was entered in the licensee’s bound book and then transferred to the licensee’s private collection at least 1 year prior to the sale or was otherwise acquired as a personal firearm. When the personal firearm is sold, the sale must be recorded in a "bound book" for dispositions of personal firearms, but no ATF Form 4473 is required.
And the whole shootin'-match from the reg book:
§ 478.125a Personal firearms collection. (a) Notwithstanding any other provision of this subpart, a licensed manufacturer, licensed importer, or licensed dealer is not required to comply with the provisions of § 478.102 or record on a firearms transaction record, Form 4473, the sale or other disposition of a firearm maintained as part of the licensee's personal firearms collection: Provided, That (1) The licensee has maintained the firearm as part of such collection for 1 year from the date the firearm was transferred from the business inventory into the personal collection or otherwise acquired as a personal firearm, (2) The licensee recorded in the bound record prescribed by § 478.125(e) the receipt of the firearm into the business inventory or other acquisition, (3) The licensee recorded the firearm as a disposition in the bound record prescribed by § 478.125(e) when the firearm was transferred
from the business inventory into the personal firearms collection or otherwise acquired as a personal firearm, and (4) The licensee enters the sale or other disposition of the firearm from the personal firearms collection into a bound record, under the format prescribed below, identifying the firearm transferred by recording the name of the manufacturer and importer (if any), the model, serial number, type, and the caliber or gauge, and showing the date of the sale or other disposition, the name and address of the transferee, or the name and business address of the transferee if such person is a licensee, and the date of birth of the transferee if other than a licensee. In addition, the licensee shall cause the transferee, if other than a licensee, to be identified in any manner customarily used in commercial transactions (e.g., a driver’s license).
An 01 gunsmith is subject to all the same rules as an 01 dealer (including personal firearms) except for the need to maintain hours and public access.