• Make sketch for modified furnace extender, change diameter, modify design to mimic real furnace so as to mate with lid correctly.
• Buy DB25 cutter
• Check Processor, Power and Analogue boards will work over 25 pin rather than 26 pin cables
• Drill holes in middle and bottom plates for standoffs
• Drill hole in middle plate for furnace temp sensor to pass through
• Swing plastic insulator on top plate by 90 degrees
• Drill hole in middle plate for cooling sensor