Because of reasons, I am likely to want to carry 30-40 ebook readers, still in their boxes, with me when traveling from Canada to the UK.

Am I going to run into any trouble if I have them in my carry-on luggage?
In particular if I have a separate bag/box that just contains them.
Should I put them in my checked luggage?
Or is it all fine and airport security will be like "weird but not illegal"?

If they are in my carry on will i be required to place them individually on trays like i would a laptop?

I am sorting out any customs issues at the other end, so don't worry about that.

---

(**Update:** We concluded it was much simpler and safer to ship them.)