Here is my homemade backrest for my vision. Stll need to cut down the lower tunes and clean up the welds and Still working out the design for a luggage rack before powder coating. I am thinking that the rack will mimic the cheese grater side covers. The back pad is from a cobra backrest off my old Honda VTX. So far i have less than $10 invested in materials.
From what I see you have no gusset on the front of the uprights.
Your going to want tall ones even in the back.
If your girl friend leans back with all her body weight and they do she will bend it or it will break.
Adding a luggage rack will weak-in it cause of your small tubing
You have a good start to the back reast
Please add your state and model of bike you have. Click user CP @ top of page and then far left click edit signature. Thanks