OpenBuilds Style Build

[WoodKnot]

Hello all -

So the main parts of my build are all arriving today -

C Beam Extrusions, Ball screws and Linear Rails, motors, power supply and some fittings.

The idea is to get all the rails onto the extrusion then fasten it together, so i can then make some templates from 6mm MR MDF for all of my plates.

A few questions in advance -

What is best product to remove all of the excess oil from the rails?

What is the best way to align the rails to the profiles to maintain exact parallel along the length?

My build has twin 20mm linear rails on each axis -

I have loads of squares and clamps to get it all square and true, but little in the way of precision engineering tools.

Thanks

WoodKnot