Agree wholeheartedly with Aussie Andy, long live the CRP!!
Used mine since passing PPL, certainly allows you to visualise the flight more easily and keeps one in touch with a little piece of aviation history! (Great as a can opener and back scratcher aswell, must agree...hell, I'm gonna get my moneys worth, why fork out £70 for an electronic calculator when the CRP can do the same job? May aswell have an hour in a 152 instead!)