Hello, the 2 holes aren't design for the screws but for the two little pin on the carriage.
If you want to fix the dust cover use double sided tape.
I recommend you to use the smooth build plate for a better result.
And for your info, ratings are for the print profile itself not the model ;)
Thanks for the feedback so the screws aren't flush with the side of the carriage? Maybe there are some variations amongst the carriage used. Could you send a picture of your carriage ?
Thanks. I didn't print this remix but before releasing my model, I tried to add a pin to lock it in place inside the hole. I from my testing I've found this feature too weak and could eventually break inside the hole. So I preferred to release my model without any pin. So you know ;)
Sorry I'm replying super late. But yes indeed, you need to use double sided tape if you want to fix it. Or if you don't mind, you can leave it on top and let the gravity do its thing (that's what I'm doing)