spiggytech Lantern chassis for ASRock X300M-STX

The project started as a concept for a cylindrical “Trashcan” Chassis for the ASRock X300M-STX found in the Deskmini. The whole thing measures 225mm tall from end to end, not counting feet. 175mm in overall diameter from the widest parts. It is approximately 5 liters in volume. The fan spots will accommodate 2x 120mm standard fans. OR it will fit the 140mm Noctua NF-P14R circular body fan (shown in the sample). 

Cooler Limit: AXP90-53mm 

What you will find in this packet are the following: 

• Motherboard Tray to mount the mobo
• Antenna Holder for the internal antenna
• SSD Tray for 2.5in SSD
• Motherboard Tray Mount to fit the assembly into an End Housing
• End Housings which will hold the fans and sandwich the shell together
• A shell which has an integral button flap and perforated airflow
• Top Grille to cap the top
• Bottom Grille to cap the bottom
• A fine selection of different feet
• There is an experimental optional short body for the bottom as well. 

The following materials will be required: 

• 6mm Standoffs
• M3x6mm Heat Inserts 
• M3 Screw kit
• M3x35mm Screws
• Y-Splitter
• 2x 120mm Fans. I recommend these

Here is a breakdown of components:

Motherboard Tray

• 4x Heat Inserts for Mobo Standoffs
• 4x Standoffs for Mobo
• 4x M3x6mm screws for all the standoffs
• 3x M3x10 screws for securing the Motherboard Tray to the Tray Mount

2.5in SSD Tray

• 4x M3x6 for mounting your SSD
• 2x M3x10 for mounting the SSD tray to the Tray Mount
• 2x M3 Nuts for securing the tray

Antenna Holder

• 2x M3x10mm screws for mounting the Antenna Holder to the Tray Mount
• 2x M3 Nuts for securing the antenna holder

Shell

• 8x Heat Inserts for the top and bottom
• 6x M3x10mm screws to secure the shell to the motherboard tray

End Housings:

• 8x M3x35mm screws (4x each) for holding the fans and sandwiching into the shell

Button Housing: 

• 2x M3x6mm Screws
• 2x M3 Nuts for securing the button housing

Build Instructions:

Mobo Assembly

1. Insert the heat inserts to the Mobo Tray Add the standoffs
2. Assemble CPU, Cooler, SODIMMs, Wifi Module, and SSD to the motherboard
3. Connect a Y-Splitter to the second fan header.
4. Assemble the motherboard to the Motherboard Tray
5. Assemble the 2.5in SSD (optional)
6. Assemble the antenna holder, route cable from the bottom or top. 
7. Assemble the motherboard tray, SSD tray, and antenna holder to the Tray Mount. This is now your Mobo Assembly.
8.  Pat yourself on the back

End Caps:

1. Put 4x m3x35mm screws through the End Caps
2. Insert your choice of fans

Assembling the Shell:

1. Insert the 4x heat inserts to each side of the shell. You need 8x total.
2. Assemble the Button Housing
3. Put 2x M3x6mm screws from the button area of the shell. Insert 2x 0.6mm shims over each screw.
4. Line up the two LEDs to the button housing to the holes in the Shell. Screw the button housing on. Insert the nuts to ensure it's snug. Test the button for clickyness. If it clicks, you're gold! If not, you will need 2x 0.8mm shims instead.

Assembling it all

1. Grab the Mobo Assembly and a End Cap assembly. Screw the assembly together via the long M3x35mm screws. Connect the fan to the Y-Splitter
2. Line up the front and rear IO to the shell
3. Slide the shell on part way. Connect the Button header
4. You may need to squish the shell gently to pop it onto the motherboard. My trick is to align the rear IO first. 
5. Assemble the shell to the Mobo Assembly with 6x M3x6mm screws. 
6. Put the Top Spacer in the remaining endcap. Screw it together. 
7. Connect the fan to the Y-Splitter
8. Screw the End Cap to the top of the shell by the M3x35mm screws. 
9. Pop on the top grille
10. Pop on the bottom grille
11. Pop in the feet. They just go into the screw holes
12. Pat yourself on the back again. 

Build Notes:

This build was really fun for me. It was also infuriating as my Mk3S went out while printing the shell. But oh well. Took a week or so to get spare parts and finish the print.

The IOs are a pain in my opinion as I've had two boards so far and neither of the IO holes line up. They might be off by 1mm. Some razor/file work might be required. 

I have not tested this design against any other 140mm that uses 120mm mounts. Just the Noctua. 

Slim 120mm fans may fit as well… not guaranteed… I don't have a slim 120mm fan kicking around. 

If you have any questions or comments, please let me know here or on the reddit thread.