While it's a very nice looking modification. I have to post some observations.
I have corbin backrest in the garage, while it was nice and did help support my back. All I could think of is if I ever got rear-ended... it would force the back rest forward while my upper body would likely remain in the same position before also being pushed forward... likely a severe result.
Now, looking at your pic, the 'spikes' extend out more than the bike. So, if you got rear-ended, well not a very pretty picture.
I would suggest removing the backrest and rack and strapping bags to the top of the police hump and light bar until you can convert to a civilian back seat/rack, assuming you want that.
Rear-ended collisions are one of the most common MC related accidents so I'm just throwing that out there.
Just my opinion and it's your bike so you do what you want with it but I did feel like I needed to plant that visual for what it's worth.