Mod Marv's Lantern vise

[mklotz]

To make cutting small V-grooves easier, get yourself a "drill mill"...

2 Flute 90° Angle "Drill-Mill" Single End Mills

They're available in a variety of diameters and point angles. One major advantage is that they make it a doodle to place the center of the V-groove exactly where you want it, something that's difficult, though not impossible doing it the tilted-workpiece way.