XYZ Printing daVinci Jr 1.0 - HeatBed 110w 9A @ 12V

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!!! YOU WILL BE WORKING WITH POISONOUS CHEMICALS SO DON'T EVEN THINK ABOUT DOING THIS IF YOU'RE NOT CAREFUL! !!! DIY HEATBED CAN BE A FIRE HAZARD IF YOU DON'T KNOW WHAT YOU'RE DOING, SO I'M NOT RESPONSIBLE FOR ANYTHING THAT HAPPENS TO YOU OR YOUR STUFF! IF YOU DON'T HAVE EXPERIENCE WITH PCB ETCHING AND ELECTRONICS, JUST STOP RIGHT NOW! GET SOMEONE WHO KNOWS WHAT THEY'RE DOING TO HELP YOU OUT. DIY heatbed for Jr's printer ***YES, YOU CAN BUY SILICONE HEATERS AND ATTACH THEM TO THE BOTTOM OF THE GLASS, BUT THAT USUALLY REQUIRES SOME DRILLING/CUTTING INTO THE METAL BASE OF THE BED TO GET WIRES ROUTED THROUGH. THIS SOLUTION WILL ONLY MAKE YOU LOSE 2MM OF Z HEIGHT IF DONE CORRECTLY. !!! JUST TO SET THINGS CLEAR - THIS ISN'T A STEP-BY-STEP TUTORIAL, MORE LIKE A BRIEF DESCRIPTION. IF YOU DON'T UNDERSTAND WHAT I'M TALKING ABOUT THEN MAYBE THIS PROJECT ISN'T FOR YOU! YOU'LL NEED: PCB Clad 165x200mm - Jr glass is 165x165, you can get ones that are 165mm wide already on eBay. You need one side to be 200 to cut a little tab which will stick out so you can solder wires to it. All chemicals and stuff for PCB etching (I'm not going to mention what exactly). Small handsaw. Soldering iron. 16-18AWG wire. 12v PSU - AT LEAST 9AMP. Temperature control board. Relay. Sharpie. THE PROCESS IS VERY SIMPLE. PRINT SVG ON A REGULAR 2D LASER PRINTER (A LASER PRINTER IS A MUST). TRANSFER THE PRINT TO PCB CLAD VIA IRON METHOD. FIX UP ANY IMPERFECTIONS WITH SHARPIE. DRAW FREEHAND TRACES FOR THE POWER INPUT SO IT STICKS OUT A BIT ON THE RIGHT HAND SIDE OF YOUR JR BED. ETCH! I HAD MY THERMISTOR CARTRIDGE SIMPLY TAPE-TAPED TO ONE SIDE. NOT PERFECT BUT GOOD ENOUGH FOR ME. BUT... YOU COULD DO FREEHAND TRACES ON THE BOTTOM OF THE CLAD TO GET THERMISTOR NICELY IN THE MIDDLE WITH TRACES GOING OUT ON THE SIDE UNDERNEATH THE POWER IN (THAT'S OF COURSE IF YOU HAVE DOUBLE SIDED PCB CLAD). I'VE COVERED ALL SURFACE WITH CAPTON TAPE TO GIVE IT SOME KIND OF INSULATION. WIRING. I'VE USED CHEAPEST AVAILABLE 12V TEMP CONTROLLER BOARD ON EBAY + ATX PC PSU TO POWER IT UP. AND RELAY WAS WIRED TO JR EXHAUST FAN TO MAKE IT SOMETHING AUTOMATED. THAT ALSO ENSURED THE BED IS SWITCHED OFF AUTOMATICALLY WHEN PRINT IS DONE. I HOPE ALL THIS MAKES SENSE. P.S.: I'LL TRY TO FIND MY HEATBED AND POST SOME ACTUAL PHOTOS OF IT. I'VE STOPPED USING IT ONLY BECAUSE JR IS NO MORE. CANIBALISED FOR PARTS.