Wanna get rid of warping issues? Just install a heated bed. But where to put the thick cables of the bed without risking them to get entangled and blocking the hole bed from moving? Here comes a solution which might solve your problem: two easy to install clamps for an igus e-chain (Series 045 ...). Print, connect to chain, mount as shown and enjoy...
No need for screws.

Change log
Added an improved y-axis endstop with cable clip for the heatbed wires.

March 13th, 2017:
Added two files for 8mm frames.