This modification to my Klic-N-Print 3D is more of a way to head off potential problems than a fix for actual ones.
The stock top extruder plate that comes with the KNP 3D is two acrylic pieces that stack together. The filament tubes go into two shallow holes and there is nothing but a loose zip tie holding the wire bundle.
I several occasions, I saw that the tubes had pulled out of the holes. It never seemed to cause a problem with the filament feeding but I felt the potential for the filament to break was greater when the tubes were loose.
I also worried that the wires were moving around too much that that one would break from the flexing.
I searched Thingiverse for a different top plate and located this one (Thingiverse Thing 1200876) that was designed for a FlashForge Creator Pro printer. From past experience, I know that many of the parts in the KNP 3D are the same as the FlashForge so I printed one to try it. Lucky, it is a perfect fit.
You could use ABS for this but mine is PLA. You can put your finger on the top of the extruder unit while the printer is running so it does not get very hot.
To install the new one, just clip the zip tie holding the wire bundle to the back screw and remove both screws. Save the washers for the new plate but swap them. The large washer wont fit on the back screw with the new plate because the wire tower is too close.
Carefully separate the wires from the fan motors and slide the old extuder plates out. Is isn't necessary to disconnect anything. Slide the new plate into place and reinstall the screws. You might have to move the plate a round a little to get the screws back into their holes. Once they are aligned, tighten them down.
Use a new zip tie to secure the wire bundle to the tower and that's it. I went a step further and wraped electrical tape around the bundle before the zip tie but that is probably overkill.
The filament tubes seem a lot more solid with this plate than with the original.
I don't claim that this mod is necessary but, I feel better having the wires and tubes firmly attached.
Update January 27, 2017
I have been happy with the top plate described here but, I found one I like even more. See the comment from longjohn below and the new blog post here.
Your Comments and questions are welcome. Please share your tips and mods with all of us.
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