I belive the V4 is anticipated to be in mass production early next year. There are a few hurdels to get over on the way which represents the only significant risk that I see. Those hurdles are obtaining a high level of sucess in the percentage of units that works. Typically 97% is the target but we can work with 95%. To the best of my knowledge the latest round of testing was close to if not at 95% but that will have to be a duplicable result. So, a huge part of my optimism is the belife that they will get this thing to an accetable percentage for mass production.