Needed things - on the pics.
Make ver. 2 of "ViceP2.stl", because I have got some PLA printing issues(defects near the jaw holes - bad cooling probably). Some small amount of additional filing and re-drilling may be needed...
Source file (AutoCad 2013+) added.
Added M8 version of the vice parts. Use M8 analogs of the M6 stuff. Source file reuploaded.
Base clamp MAX distance reduced to 22 mm. Not sure about M8_C.stl part. If walls are to thin - msg me I ll correct the object.
P.s. Forgot to mention, if You do not intent to make some custom jaws for your needs - they may be superglued, as I did.
Added part M8ViceP1_extra25mm_LongRail.stl on request. You have to change coresponding M8 bolt and spring with ones, that are 25 mm longer.
Purple parts - ABS; strange colour(should be Gold :) - PLA.
No need of support. There are build-in support blocks for 2 of the parts - easy to remove (for nozzle 0.3-0.4).