>>293801139
Don't use tapes for the lighthouses.
Try out inserting that extra foam for the back of the Index.
Also, when putting it on, first put it on, then adjust the wheel to the back, then adjust the strap on the top. The headset is supposed to have its center of weight on the top, not the sides or back/front.
Lastly, try out not fastening the wheel to the back too much. The headset shouldn't fall off, yes, but you don't need to make it super tight at the start. You'll get the hang of optimal settings that don't hurt (much?) after a while.

t. anon whose back/front hurt a lot at the start, too