Hi
Ok i remember people on this forum suggesting a student pilot to use the lumocolour feltips to mark on the wind side of the computer to get accurate results, and hence perform better on the Nav written exam.
I have been using this method for a while and use nailpolish remover to remove the small dot (other ways use a lot of scrubbing

)
well, my CRP1 computer has had its end today, some nailpolish remover got to the degrees markings on the inner scale and completely rubbed a part off it; making the wind side of the computer effectively unusable
Im gona go for a new CRP5 now as Im gona go Commercial anyway...
Well, i guess this is just a word of warning to anyone else out there like me...