I have built all of the Roden 1:32 scale WW1 aircraft kits and right from the first one to the last one all their decals have been very touchy, I managed to use them all without having to make substitutes but it was touch and go some times, they are very brittle and they don't like certain decal set solutions. I don't know what their decals are like on the 1:72 scale kits but I am presuming they are the same.
Des.