@wojtek Thanks. Yup, that pretty much must be what I’m looking for.
The model is still on the regular domain but I have whitelisted that. I did also upload it and test it there but the furthest I got was an iframe window stating “Display forbidden by X-Frame Options”.
I actually worked around this quite OK by just adding a “Open URL” pointer that directs the user straight to the Messenger window of the company in question. This opens as a new tab, which is OK but it would be really nice to get it as an iframe window instead, thus not directing the customer out of the fair.
I’m a noob all coding considered so a few screenshots of the actual process of installing this would go a long way haha.