I have an X2 and have the quick vice which came with it which I do NOT recommend, it is OK after I sorted it out as StillDrillin showed me in one of his posts...

I`ve recently seen one of these screwless vice on an X2, looked and worked great. Not got one myself, yet, but certainly worth considering!
Regarding Chronos, I bet they are missing a fair bit of Christmas trade suspending there orders. Although even now, 10 days before Christmas it is unlikely it would arrive in time anyway!