I am not sure on the other parts, but the projectors will not get you there.
The "possible" 8 ceramic DLP chips should weigh in around 6.4 oz worth around $10 - $11
few lbs of cast AL "possible" some are plastic
few lbs of steel
oz or two of wire
few lb's (2 maybe 3) of mid/high grade PCB
The tear downs on projectors for me were very time consuming.. the board with the chip is the last piece to come out in most cases.
And by most I mean the sledghammer has a way of speeding things up









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