Printable side panels and corners. Use M4x12 screws with inserts. The holes on the corners are good enough that you don't need inserts. You can use nuts and M4 bolts to attach the panels together. You need 6 short panels,2 long panels, 4 corners as well as the Rear middle to make a full set with the fan. Or, If you don't want the shroud, You need 4 short panels, 4 long panels and 4 corners. Use the Magnets as per the original top-hat design and use the factory aluminum cover.
Update 1: Added additional diagonal stiffeners to all panels for rigidity.
Update 2:. Modified Rear middle piece, added Captured M4 nuts to assist in assembly.
Update 3: Added Chamber heater and many additional panels and pieces
The author remixed this model.
This is a remix to Mr. Edgett's excellent top-hat design. His is incredibly robust, but I was in a hurry and couldn't wait for laser cut aluminum pieces. I've modified the corner pieces to fit around the screw heads of the machine better and truncated the pieces to take a printed side panel with hidden M4x12 screws. Thus you can avoid having to use laser cut aluminum, but still retain the original clever design elements like magnets and forced ventilation for PLA. You can use Heat set female inserts on the corners if you want. Mr Edgett's Fans shroud pieces and covers will work or you can double up the front to nix the rear fan altogether. The factory top cover still works. Mr Edgett's magnet specifications are the same. Print with suitable high temperature filaments such as PC, ASA or ABS (the higher the glass transition temp above 65C the better). PETG should work if you're doing PLA and PETG, etc. Thanks for Mr. Edgett's for his original work.
Edit: Chamber heater and wiring
This is a Remix and expansion of Edgett's tophat.
https://www.printables.com/model/639518-snapmaker-j1j1s-tophat
You will need the following Hardware:
(8) 15mm x 2mm Neodymium Magnets
(12) 8mm x 2mm Neodymium Magnets
(32) M4 x 12mm button head screws to build the tophat
(14) M4 hex nuts for tophat
(4) M3x35 button head screws for rear ventilation fan
(4) M3 hex nuts for rear vent fan
(28) M3x10 button head screws for wire chase covers
(12) M2x10 button head screws for Heater wire clips
(16) M3x12 button head screws for miscellaneous things
18 Ga wire. Recommend black and white for heater power and red and black for fan power, 2 other colors for thermistor
Solder or crimp connections
Wire harness loom or heat shrink for wire harness
Molex 6-pin Black Connectors, 4.2mm pitch https://www.amazon.com/dp/B07DLKJLMW?psc=1&ref=ppx_yo2ov_dt_b_product_details
C14 power plug for rear panel: https://www.amazon.com/dp/B081VJ22G4?psc=1&ref=ppx_yo2ov_dt_b_product_details
Three GDSTIME EC cooling Fans 60x60x25 110V fans. Use the screws that come with the fans to mount the fans https://www.amazon.com/dp/B07H8V6YS6?psc=1&ref=ppx_yo2ov_dt_b_product_details
Gebildet 110V 4 pin 2 position waterproof DPST rocker switch, illuminated https://www.amazon.com/dp/B0C2BQ31PM?psc=1&ref=ppx_yo2ov_dt_b_product_details
PTC heating element 110V 500W ceramic air heater https://www.amazon.com/dp/B07P5NCR2F?psc=1&ref=ppx_yo2ov_dt_b_product_details
Inkbird Digital Control Box ITC-1000 thermostat https://www.amazon.com/dp/B00OXPE8U6?psc=1&ref=ppx_yo2ov_dt_b_product_details
One standard PC power cord C14 style