I found that when removing the logic board out a bit that the IR sensor was not so much of a problem as was the HDD temperature sensor located next to the IR sensor.

My logic board accidentally popped out rather quickly and pulled out the sensor for the HDD.

I don't know why it's not mentioned in the earlier step to just use the spudger to pop this cable off. Since it is mentioned in other guides for removal when replacing other parts.

This would have been really helpful and most likely I would not have been left with loose cables and now looking for a new sensor cable.

So fo any others out there replacing/upgrading your HDD and have some what of a hard time getting the logic board to budge just a bit, use the spudger to pop the cable off, it's not hard and pops back on as easily as the others. That's just an FYI and a preventative measure.