Z-axis Linear rods

Z-axis linear rods for cartesian 3d printers, fits any bed size.
The pictures are on my modified d-bot (www.thingiverse.com/thing:1001065)

You need:
4x Ø16 linear rods
2x V-slots 20x40
4x Linear ball bearings LMEK16L
16x Bolts M4x10
4x Bolts M3x10
4x Bolts M3x20
8x M3 nuts
and of course the ordinary M5 and square/t-nuts to fasten to the V-slots (38sets)

When mounting the bearings with the M4 bolts, it's recommended that you first tap the holes, but it´s possible to just screw the