The SGB CPU is compatible with the DMG. By swapping the CPU, your Gameboy will skip the falling Nintendo animation. This decreases the boot speed.
#Rules: taken from r/gameboy
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This is a Game Boy community. Related content includes the original Game Boy, Game Boy Color, Game Boy Advance, and hardware that is able to play those game libraries. (Super Game Boy, Game Boy "Macro," GB Boy Colour, etc) Occasional posts about fringe topics (Pokemon Mini, emulation devices, etc) may be acceptable, but will be removed if they become too frequent. 4. Rule 4: No buying/selling/trading
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Did you use a heat gun to get it off?
Hot air station. Put down some tacky flux and kept it moving around the chips at about 380c.
Good job! You've done the research!