Raspberry Pi3 B+ cases - print without support

I have designed series of cases for Raspberry Pi3 B+. They fit the board with heat sink mounted on the CPU (15 mm tall will fit). I have thin wall minimalist design. I also have thick wall variety for extra sturdiness. Thick walled case has two tops available with just vents and one allowing to install standard 25 mm x 8 mm fan in addition to the heat sink.

Cases are to be assembled using #3-48 x 1.00 in screws from Amazon:

https://www.amazon.com/gp/product/B00916IRIQ/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

I was able to screw the fasteners in without tapping.

Print without supports.