Loved the puzzle -but I think you should have had a capital R:-)

Great, logical puzzle! ~:)
@Margpheb: I think maybe there wasn't enough room for the upper case R. I've had to resort to lower case letters before too when I just can't seem to fit the upper case letters in. :)

Logical puzzle with nice picture.

Intriguing, thanks.

Ah, this was a good one! I actually thought the black regions were background right up until the picture was almost done, and I realized it was actually the plane. I suppose it camouflaged itself better than I was expecting. :^)

Thanks.