Thanks for the input! I see often full chassis + motherboard setups going lower than the actual motherboard on eBay. Quite clever way to get free chassis if you have the audience for the hardware lol. Paid 240€ incl. shipping for the chassis and x9dri-ln4f+ with dual PSUs (and 1x overpriced 2609 CPU and 1x4GB stick that "had" to put in to the configuration).Totally depends on the age (revision) of your chassis, but I reused lots of chassis (including the 825) and usually its no problem.
Had once a rivet that caused a short so had to tape it off (on a 836) iirc, and sometimes you miss one, but else...
Just make sure to map out the rivets and to be sure to remove all old ones
Cant speak for H11 though (ie whether that has different layout)