I went and got my 346 off the shelf and lubed it up to give it a spin. I actually have every one of the 0-8-0's except the DC versions. Boy was I pleased to here its whistle blow. The 346 is the only version that was so equipped. I will have to rebuild the smoke unit, but other than that is ran well.
There is one thing we haven't mentioned. The reverse unit does have a switch to lock it in one direction or in neutral. It is able to be seen on one side of the unit. You pull it back to lock it or forward so it will cycle.
Mine's reverse unit worked OK. Every once and a while I tapped on the cab to get it to go to the next position. But, I do that with a lot of the original 4 step reverse units on my Flyer engines.