Aurora A3 BAWS Y-Axis Idler Tensioner

I'm probably too old to use the word 'Baws'...oh well.
Somebody mentioned somewhere, somewhen, that the original design I threw together might be too weak (shown here):
http://www.thingiverse.com/thing:2139390
So, I thought I'd make a TOUGHER version!
Bwwaaaaahahahahahahahaaaahahaaaaaaa......

I've included the original Sketchup file just in case you don't like it and want something better.