Thanks. I'm talking about Fly6 Gen3 on the left and Cygolite Hotshot/Hypershot on the right. Also, I use a Racktime Addit rack which may be somewhat limiting because the light mount is recessed between the rails. The light mount with lights would have to be < 100mm wide. Rack drawing here: https://www.racktime.com/fileadmin/u...dit_2.0_01.pdf