Some 7D questions

[sgofferj]

Morning!

I recently got a 7D and I'm planning to use it with ML for video and photography, mainly wildlife. I have a handful of old 8, 4 and 2 GB cards and already successfully upgraded the camera FW and installed ML on a card. So far so good.
Now, what's the biggest size card the 7D can handle? Any recommendations for cards for MLV?
Any caveats for shooting video with the 7D? On a quick research I read something about overheating?
And then a less ML-related question: I already did some photography with the 7D and compared to my 6D, the raw pics look a bit washed out and less sharp out of camera. I'm using darktable on Linux for developing my raw pics and for the pics from my 6D I rarely need to apply any big expo or contrast correction, especially when using ML AETTR. The 7D pics I shot all required pretty strong modifications of black point, expo and cranking up the sharpening a lot.

[Ottoga]

I use komputerbay 128gb cards without any issues.

[DeafEyeJedi]

128GB 1066x from KB works well on the 7D as well.