I am sorry, I did want to respond to the yelloe question before but I got og on another tangent

I find Yellow to be very easy to see in all conditions. My 4*60 is yellow with neon orange stripes on the bottom of the wing wich show up very well.

I also seal all of my hinges. I have been doing this since I had heard about it. I will say that I have not done the 4* and do not intend to but everything else is done. You can easily see the difference. Fly a few times before sealing them and then after you will notice you need to change trims and the plane just seems to respond better