The biggest issue with the VL Genset is all the delicate added on parts. Oh, and do NOT hold it by any windows, they pop out if you look at them! 
When you get it running right, it's a very cool rig. I use the flapper stacks for demo only, when I want to run it for any length of time, I put the straight stacks on it. The flappers get gummed up with smoke fluid after a spell and you have to wash them off by dipping them in alcohol and swishing them around. They're then ready for another 10-15 minutes and they'll start sticking again.
