Add all 24 M3x8 screws and t-slot nuts finger-tight to the 3 brackets.

Then align one of the profiles with the two nuts of one of the brackets. Always starting with the outer screw first, loosen the screw 5 full turns, then tighten it 2-3 full turns until the profile is held tightly against the bracket.

After both nuts connected properly, add a second profile to the same bracket.

Then add third and fourth profiles to one of the brackets and place the USB cable between these two profiles.

Then add the third bracket and lastly, add the last two profiles to two brackets in order to complete the triangle.

From this point on in the assembly, it is necessary to identify the 3 towers individually. Looking at the profiles with the flat LCD cables between, the front left tower will be X, the front right tower Y and the rear tower Z. The extrusions joining them will be referred to as X-Y, Y-Z and X-Z.

The pulley is fitted with the collar and grub screw facing towards the motor. This provides correct alignment with the idler at the top of each tower.

Align motor with plastic bracket, with the cable socket on the left-hand side of the motor viewed from the bracket end (hidden in the picture above). Insert four M3x8 screws and tighten with the ball end of 2.5mm hex key.

Repeat for the other 2 brackets. The completed base assembly may now be set aside while you get on with the top assembly.