Hello,
I found that the base was a bit wide and high and the plate slits a bit too long.
my suggestion would be:
take 10mm of the base in height.
take 8mm of the base width
take 5mm of the plate slits length
the rest I liked, it is a very nice design and very functional.
I liked the different models you made!
I do not like logos but that's my opinion :)