The only credit I can take for the animations are finding them on the net and saving them to my hard drive. I think someone on Matrixowner.com did them.
As for the o-rings... they can be tempermental if you don't treat em right, but I've never shot a marker as smooth as my DM, so it's a trade off, possibly finickyness (word?) vs. amazing performance.
The only o-rings I've had issues with were with the front inside oring that the bolt rides on and the second to furthest back outer o-ring (marker was recharging super super slow... pulled the bolt out and found it stuffed most of the way into the hole that provides the air... no idea how that happened!)