I thought that the "special parts" needed were to convert the .68 to .50...
So, I heard that all you needed to do was pull out a .50 (breech area) part and then it would be a .68. Is this not the case?
I would be curious to find out and confirm this.
Also, if you could take photos (of the parts) and document your conversion...and share them here with us...that would be awesome!!