Letter T with crystals keyring

This is a keyring I made as a present for my cousin, whose name starts with the letter T.
I designed circular spaces to be able to push and glue Swarovski crystals on the letter. The spaces for the crystals require circular crystals of 5, 4 and 3mm in diameter.

The item in the pictures was printed in white PLA with 0.2mm layers, 4 shell passes and 40% infill.
Spaces for the crystals are quite tight, which should ensure that the crystals stay put for a long time without falling off. I glue