LEGO Millennium Falcon 75192 Display Stand from Wicked Brick 

I don't personally have a concern with the thickness of the Perspex/acrylic as that suff is pretty strong. Yes you can snap a strip of if, say the support brace, if you were to bend it but that's because its in tension on the bowed out surface which it is weaker in. The support arms have good depth to them to spread the load to the stand and for them all the force is in compression downwards, its compressive strength is much higher. Even better is that the Falcon sits hard against the back support which will take some of the weight of the Falcon off the support arms. I did not even have much of a concern about the Perspex/acrylics thickness/strength in the Unique Display stand (see my other video) even though the Falcons weight was more towards the ends of the support arms because it did not fit flush against the stand back. My biggest concern with that stands was the likelyhood of the Falcon coming off the support arms due to the minimal depth into the superstructure and also where the arms were placed, and so it ending up on the floor.

Out of interest what make is that stand?

The stand is made out of Acrylic but it doesnt have a brand name or anything. But it works just fine

Yes very much. A friend has also bought one and is really pleased with it. If the UniqueDisplay one held the falcon better I would suggest that as an alternative as it's base cost, before shipping, is less.

It's going to be an epic build, I timelapsed it down to 1h 45m from 19h 30m real time. Good luck.