I have the Transfer 9 and the peak has become very floppy (i.e. it moves up and down quite freely): Have you experienced this and/or come up with a solution?

Usually, helmets have a screw on the underside, on what would be the forehead of the helmet, but this doesn’t have one, which is the only downside to it IMO.

Thinking about it, I could just use some duct tape, but I was hoping for something a bit more sophisticated, if possible.

Foam blocks cut to fit between the peak and helmet, with some double sided tape to secure the blocks ?

Yeah, I was also think of some kind of foam block solution as well. It will just need to adhere well to the smooth surface.

I’ve got a Full 9 and you just tighten up the two alu visor pivot screws. Yours not got them ?

Mine’s got two plastic visor screws and they are as tight as they will go.