Big, heavy, and in awesome condition. Baldor 5hp 3phase motor. Built by Champion Pneumatic Machinery co. Princeton Illinois. I'm guessing it's a 60-70 gallon tank. I have pictures on my phone that I can send an interested buyer.
I had a sweet deal for the first few years I owned my TDI. My wife’s cousin who,lives in Germany had close connections to VW.
He would bring small stuff like timing belt kits,injectors and suspension bushing in his suitcase for me at great prices and they were quality OEM items.
We tend to get more crappy knock off VW stuff here from Asian factories than the Europeans do.
I will always pay a bit more for a trusted oem supplier than off shore no name garbage !
You get get some weight transfer to the front axle, I don't know about percentages but 10% would be a conservative estimate. WD hitch will work on the extended tube. Are you using a torklift hitch and extended bar? I think in a SRW the WD hitch will help stabilize the towed trailer a huge amount.
You should run your tuck across a scale and get the axle weights. With a 4klb camper on your back you should be in the 6,900-7,200lb rang and put you over your axle rating. Now toss a trailer behind that and there is another 6-7klbs to add to your GCWR. I would highly recommend using a WD hitch to try and get some of the weight off your real axle and shift it forward. As far the total GCWR goes you will be under it by a good margin. The issue will come in with total axle weights and the 11,700 GVWR. You will be using every last bit of it and then maybe as much as 500-700lb more. The area of concern I have is that you will be at the rear tires max rating and if they weather is hot you could be asking for a failure.