Possibly slightly warped extruder assembly?

Is it possible that the extruder assembly warped slightly from heat inside of an enclosure?
When I first printed this dial indicator mount http://www.thingiverse.com/thing:731620 it snapped on nicely. I went ahead and bought an indicator for it. Now it doesn’t fit. The mount isn’t worn out, I snapped it on once.

Abs will start to soften at around 300 degrees. If your enclosure is getting that warm you may have issues. It would be difficult to get it that warm without a heater.

So, warping is unlikely. Looks like I have a Scooby-Doo mystery on my hands. I’ll find a mount with a less touchy attachment method.

I use this one http://www.thingiverse.com/thing:551366 it replaces the extruder (a little pain to unhook and unscrew) but it seems to work perfect.