Smity , I just did mine and set it up for 2" it's easy as hell, I would do it again . I hope thi ad helps.
I lowered my 2015 streetglide with the progressive spring kit. The kit comes with a choice of 1" or 2" lowering. I used the 1" lowering spacers and I love the ride. The kit is very easy to install you can remove the front tubes without removing inter or outer faring, just remove the cover below the key. You don't have to remove the swith, the cover is notched.
Did you lower your rear as well?