While building my L4P I looked at everything available and I loved my Rosen's in my A36. When I got a ride in a 4P and he had removed the Rosen's because of hitting his head and not giving the coverage one would like. I really didn't like the three studs still sticking out pointing straight at my skull. He recommended the very cheap Sun Shades for Walgren's which I have used in the Sun of CA and AZ for the past 4 years and they work great.

 

The ones I use cost $4.00 or $3.95 and 2 come in a pouch about 8X8. When opened they are about 12X17 each (guessing) with two rubber suction cups. With one hand you can pull one suction cup and walk it around the windows including spanning the pillars. With two shades you can accommodate any position. You can also see through them but with much reduced clarity. They weigh nothing and can be stored easily. I'm only 6 foot and in turbulence I have hit my head hard on the door frame more than once and one time my Boise headset ended up on the right front floor. Don't overlook ramming your skull hard into what ever your permanently install. These won't hurt you.