I shall certainly try out the initial version and provide feedback, but consider the offer open regardless. Having someone from ROL or Castle decide when compliance is reached is indeed agreeable, but for certain points (I can only think of one right now) where the style guide is open to interpretation, it should behave as the majority of RISC OS applications do (ie. be in the spirit of the style guide). FYI, the one I can think of is the window maximise issue - it's possible to interpret the guide as saying a maximised window should/could fill the screen, but clearly that's not what RISC OS applications do. They obey don't cover icon bar, and they only become as wide as necessary to display document contents.
I should point out that complete complience, for me, means that there aren't extra things there. For example you might do style-guide menus, but for complete complience you'd have to remove any other menu system. What I'm requesting is pretty easily summed up by saying it should seem like just another RISC OS application - if it manages that trick I'm not going to argue.