You bought these on the cheap. If you want a cool looking black face mandolin with a pickup, you could sell it, make $500.00 or so and then commission a builder to make you just what you want. Oh yeah, that would cost you over $5,000.00. Then again, you could invest a few additional hundred dollars on your F-9, get what you want and not spend so much. In the end, you'll still have a Gibson and a great story to tell the purists (not that there's anything wrong with being pure).
I have a feeling that the F-9 market in the next 20 years is not going up as a collectable. Then again, maybe folks thought the same way with the Flatiron 1N - ha.
Did I help?
ˇpapá gordo ain’t no madre flaca!
'20 A3, '84 1N, '06 Phoenix Bluegrass, 2012 Cohen A5, 2012 Muth A5