I'm running some headless Pi servers and wanted something cheap. It meets and exceeds my requirements. They can be used individually (flat or with an extension that can hold a hat). Or they can be stacked on top of each other and come with a detachable, sliding mounting base that can be attached to a surface with screws. Besides, I didn't need it. As in many cases, the GPIO pins are exposed. But if you're using a hat, there's still room in the case, so everything is included in the case. It ends up looking semi-professional, not like a Frankenstein with wires and circuit boards hanging down The build quality is excellent (no excess plastic from injection moulding), all the parts fit together well. For $10, it dwarfs every other case I've seen. This will be my goto case. Highly recommended. The photo shows 2 units, the bottom is a pi with no hat and the top has a hat with a deeper cap. The only thing I would suggest the manufacturer is to make an extender/connector (for the middle units in the stack) , which allows the hats to be used on medium blocks.
GeeekPi Raspberry Pi Cluster Case with Cooling Fan and Heatsink for Pi 4 Model B, 3 Model B+ & 3/2 Model B
11 Review
π Ultimate BBC Micro bit Sensor Starter Kit: Keyestudio 37-in-1 Box with Tutorial, Compatible with V1.5 & V2, Gift for Kids and Adults (Microbit Board Not Included)
11 Review
Vilros Raspberry Pi 4 4GB Complete Starter Kit - Black Fan-Cooled Aluminum Case for Heavy-Duty Performance
12 Review
π MCIGICM 2 Channel DC 5V Relay Module: Optocoupler Low Level Trigger Expansion Board for Arduino UNO R3, DSP, ARM, PIC, AVR, STM32, Raspberry Pi
11 Review
M.2 Screw Kit: Easy Mounting for NVMe SSDs on ASUS Motherboards
19 Review
Comprehensive 500pcs Laptop Screw Kit Set for π© IBM HP Dell Lenovo Samsung Sony Toshiba Gateway Acer
12 Review
π§ Premium Repair Replacement Screws & Tools for MacBook Pro Retina 15"/13" - Complete Bottom Case Set
10 Review
π₯οΈ Helifouner 450-Piece Computer Standoffs Spacer Screws Kit: Ideal for Hard Drive, Motherboard, Fan, Power Graphics & Computer Cases
10 Review