I haven’t noticed the bags going wrinkly on these, but have seen that in the past.
I’m planning on replacing these on the Sexton. I don’t trust DS either! Fortunately there are plenty of AM Sherman tracks to choose from. A shame there aren’t more choices for the CDP links.
Decals are not a problem either as I have the Fingerprint Designs British Armoured Division sheets. In theory they enable you to mark out pretty much any vehicle used from D-Day onwards.