Definitely not stock drivers. Had a look at mine and could make them work. Slight modification to the inside of the driver to allow them to set tight to each other. No matter anyhow still doesn't allow ya to run the alpha track without outside windows and clips.I saw the gen4 alpha sled that someone built. Wonder what they did for a driver/ shaft mod to run that setup. Push the driver's together, I doubt it. probably can't get them close enough. Probably custom drivers or shaft. Have to look at mine when I get home...Curious now.
More pics posted of the alphadoo.