Today was assembly day for the trailer we picked up a while ago. Turned out alright, still needs a few things (rear reflectors or lights). More pics when we have it set up (next weekend probably).
As for muffler hanging, I replaced mine some time ago with a spring and a pair of bands made from steel strapping (used to hold heavy objects to shipping pallets) which isn't hard to find in most light industrial areas, and a short spring from the asst. hardware section of the local hardware/department store. I've been running like this for a long time and have no problems with the exhaust that aren't preventable with routine maintenance (Checking and tightening all the nuts and bolts weekly).