Subsequent installation of a roller shutter in ETICS

Well, not really expensive actually. About 200€ for roller shutters + motor seems quite reasonable for a permanent solution. I can install it myself. Fancy clamp variants like those from Blinos, for example, are significantly more expensive?! How do you mean that? The box is placed on the rails beforehand and then simply pushed from below into the cavity. Then the rails are screwed tight.

How do you mean that? The box is placed on the rails first and then simply pushed into the hollow space from below. Then the rails are screwed tight.

well then good luck! Please post photos of the result

Well then, good luck! Post some photos of the result

If it is actually of interest, gladly