3DR Richrap Fishline Idler (by Nakuta)

This Thingi is a Idler for the Richrap and also the JohnSL 3DR.
It Idles the Fishingline like Prusa X Belt Idler.
M4 Nut in the Top Nuttrap.
An M4 Screws through the Bearings with 2 Washers. It tightend with a Nut for the Aluextrusion.
The Second Screw (in the middle) clamps also with a Slotnut in the Extrusion. This must be tightend before idle. it must clamp alone without clamp in the idler. because the top idlerscrew lean on it.
Let these Screws a little bit loose before you tense the Fishline. Tense now the 3rd Screw on the top through the Nut an tense the Fishline. After good Tense tight the 2 other screws...
any question ?
edit: now more idle lenght (6mm)
(german into english ;-) )