I've been messing around with the Tile A panel, and have tried to change my mountains (in Tile A2). I was trying to make something closer to Landofshadows mountains, but unfortunately I failed utterly.
So, i tried another method, which was simply stretching and re-arranging the current mountains, which turned out ok (see attached) but it has some bugs i still can't fix, so if anybody can help, please do so!
The file still has my attempt at trying Landofshadows method, and if anybody can get that to work, I'd happily use that instead.
Cred of course to Landofshadow for the original mountain idea.