Improved K40 cable chain brackets

I printed out the original version of this cable chain, and while the chain and chain ends printed out and fit very well, the brackets didn't fit my K40.

The larger bracket that affixes to the X-axis was too long and would hit the back of the case before the gantry hit the stop switch. And the laser head bracket didn't fit with the default screws that hold the metal plate down. The stock screws are pretty short, and I would have needed to buy longer screws to use with the printed L-bracket, but I didn't feel like doing that.

So, these files are just for the brackets. The X-axis bracket has been shortened, and the L-bracket has the bottom hole replaced with a chamfered slot so it can be wedged under the stock screws and tightened down. I also changed the default orientation for the L-bracket so it will print out stronger in the direction of force the bracket is more likely to encounter.

ORIGINAL MODEL: https://www.thingiverse.com/thing:1275013
The original model also contains