X-axis end stop issue  

X-axis end stop issue

I finished assembly of the MK2 kit, and like some others on the forums, have had the following issue.

The x-axis carriage that holds the extruder does not trigger the x-axis end stop. I tried pushing the end stop all the way out but it didn't move very far. So I then glued a small piece of plastic on the surface (~1.5mm) that is supposed to trigger the end stop. This partially works, but the wire bundle coming out the back of the x-carriage still pinches against the frame before the end stop is triggered. One of the wires has already started to fray after only 2 prints. I have a kit shipped very recently.

My thought is to add a thicker piece of plastic to the surface that triggers the end stop (approx. 3.5mm) but I am worried that this may mess up the XYZ calibration process as well as further reduce my x-axis print volume.

I don't mind adding more plastic, but I want to make sure that won't start to mess up calibration.

Anyone else successfully solve this issue?