Back when I was studying at a vocational high school majoring in computer & network engineering, I found a damaged DVD RW for fun and then I took one and took it apart and it turned out that there were 2 separate Diodes, one for CD and one for DVD which was really bright, and I tried to take one Lite On brand as well with the same result , but the Laser DVD is completely broken so it can't be used.The lasers are the same size TO 56mm. Then I tried to buy a used DVD RW for Rp. 30,000.00 ($2.00) at random, and what came was the Samsung brand SH22, as soon as I unpacked it, I was immediately disappointed because the Laser CD and Laser DVD came together in a flat shape with a The 3 pins are aligned, do you have any tips on how to choose a used DVD RW with a separate Laser Diode CD&DVD with the TO 56&TO 38mm shape?,so I can make a burning laser pointer