The mini-console trend isn't just a case of repackaging classic, beloved games and cashing in on our shared retrophilia. There's also a practical reason for their existence: Most old consoles are incompatible with today's TVs. Unless you've held on to a CRT, you've got no choice but to seek out special signal converters or, more likely, let your best childhood friend gather dust in a closet. But there is a middle ground. With 8BitDo's $20 mod kits, you can, at least, give those classic controllers a new lease of life by repurposing them for the Bluetooth era.