Adjustable Mendel Work Lamp V2

I have a couple of single LED lamps mounted on the front arms of my Mendel, but i wanted more light, and an adjustable source.

I designed this thing. It bolts onto 8mm bar, and has adjustable elbows, and holds an LED module with 3 LEDs.

I found this LED module at Jaycar.
Jaycar Part Number ZD0473. $3.00 each.
It has 3 LEDs and a resistor on a flexible strip, with adhesive on the back.

It consists of 3 parts.
You need 1xpart1, 2xpart2, and 1xpart3.
You can use more part2's if you want.

I initially had recessed nuts and bolts on the parts because i like how they look, but they didn't work very well. When i moved the lamp, the couplings got tighter or looser, and it needed to adjusted all the time.

Now i have removed the recessed nuts, and i use a bolt and nyloc nut to hold each coupling together. I fit a single M4 washer between the plastic parts to provide consistent friction.
The coupling can be moved repeatedly, without the friction changing, so it can be moved