Agreed that weight distribution is not a major factor in this instance, although the WD bar should be tightened to keep the bars from rattling. As far as the anti-sway function of the Hensley is concerned, I don't think that your contorted hitch bar situation would affect the that portion of the Hensley's job.
I would consider calling the guys at Hensley and outline your plan. Se if they have any issues with it. I have always found them knowledgeable and most helpful.
__________________ SuEllyn & Brian McCabe WBCCI #3628 -- AIR #14872 -- TAC #FL-7 2015 FC 25' FB (Lucy) with HAHA 2005 Suburban 2500 Quadrasteer (Olivia) & 2011 Silverado 3500 (Fred) with Outfitter Truck Camper (Ethel)
I called Hensley. He stated they tested their drop hitch to 8". I explained my contorted plan. He neither agreed nor disagreed. Just reiterated the test to 8" drop. I wish to be safe. WD in this case is of minimal use. The anti-sway function I wish to retain.
Remember, the Hensley head box opening, top, is 5 1/2" BELOW the top of the ball coupler height. In my Case, I need the top of the stinger at 15" from the ground. I don't think 8" drop is going to get you where you need to be....if I understand your setup correctly.
"If the women don't find you handsome, they should at least find you handy." - Red Green
If I am understanding what you are saying correctly then I had a similar issue after purchasing the TV we have now. I needed a stinger with a 10" drop. I came up with a plan somewhat similar to yours - the major arm-chair feedback to the idea was speculation that there would be a lot of "slop" in adding an extra receiver into the mix - just didn't seem a good idea. I then spoke about the issue to Hensley and to Can Am. Hensley gave me the same information they gave to you. Can Am had dealt with the problem before and had a couple of different approaches. If I recall correctly they included welded changes to the existing hitch. In the end they fabricated a new stinger with the 10" drop for me - this has worked well - now into the 5th season of use with that stinger.
Might be worth giving Can Am a call - just to see if they foresee any issues with what you are thinking - or they might have alternate ideas for you to consider.
Bambi - 2002 (The Toaster)
Pathfinder - 2009 (The Buggy)
"I'm not young enough to know everything ....." (Oscar Wilde)