Simple fix: add 1100 pouinds of weight to the forward of TT axles,
I be more concern about the TT frame having additional overhang, not designed by the TT manufacture's engineers. Is your engineer familar with frame rails aka channel steel sizing and guage? What about ply rating of your tires,
Are they capable of additional wt?.
You should start by loading your TT as if your outbound. Take it to a public scale, and scale each axle and then the entire TT. Your TT will have a max load rating, make sure your not overweight. Also the axles have a max load rating set by the manufacture, make sure your within your axle limits. See if you can carry the additional wt. After comfirming the above load your HD and go back to the scale and repeat all and see if your max wt is within the TT limits and dont't forget to make sure yout TV isn't over it max load ratings
What's your TV?, can you put the scooter in the back? Have you seen others doing the same on thier TT.(I haven't seen that setup)
And lastly do you want your HD sitting on somthing that only has a 2 inch (the ball) connection to you?
Scrap it; either buy a little popup to tow behind the HD or get a truck as a TW (and if you already hve the Pick up then put HD in the back of it.