Well I now have two of the special Gyromite cartridges with the Famicom board and
Famicom-to-NES converter inside. After reading about these and the 4 other cartridges that
have these special boards I started looking for them at my normal stops. Of the 4
cartridges I purchased 2 had the boards inside. With these I can run Famicom games
cartridges on the NES box.