Quick 1DX 800/5.6 1.4xII Test

Someone asked me to do a quick test for them and I thought I would share them here.

I taped the pins on the 1.4x II Canon extender attached it to my 800/5.6 then attached the 1DX.

The 1DX read f/7.1

I attempted to AF on object about 6 to 7 metres away(ambient house lighting). The camera hunted a little but it obtained focus. I then attempted to focus on a lightbulb that was switched on and only slightly out of focus. The camera quickly obtained focus.
Next I spun the focus wheel on the lens so the lightbulb(switched on) was OOF by about a meter. The camera quickly obtained focus.
I tried this again but the AF was stagnant and the body now read 00. I discontinued the test.

Just thought this might be of interest to some.