Misaligned bolt hole IMGP8558.JPG IMGP8553.JPG IMGP8557.JPG Doesn't stick and melts when device is on Not so safe safety-earth connetion Not so safe safety-earth connetion IMGP8559.JPG I had to redo the lousy ground wire Thermo couple Hrrrmmp! OPTO isolation slot Good policy - wasn't implemented YOUYOE 858D+ hot air soldering station Intelligence inside A little mishap Painful camera setup 50 chips YOUYUE 858D+ PCB YOUYUE 858D+ PCB That didn't last very long Some shrinking tube for mechanical support An Evil Cable IMGP8549.JPG IMGP8552.JPG Should I be concerned? IMGP8538.JPG IMGP8536.JPG Egg warmer OP-70 precision opamp 7805 IMGP8542.JPG IMGP8547.JPG IMGP8541.JPG IMGP8539.JPG IMGP8540.JPG IMGP8536.JPG IMGP8531.JPG IMGP8535.JPG Isolation slot OPTO + TRIAC + SNUBBER IMGP8528.JPG IMGP8530.JPG Some cleaning would have been nice IMGP8521.JPG