5.1 is an experimental branch, see also changelog 5.0.
Supported models:
Giga (KN-1010)
Hero (KN-1011, KN-1012)
Start/Starter (KN-1111, KN-1112, KN-1121)
Air/Explorer (KN-1613, KN-1621)
Extra/Carrier (KN-1711, KN-1713, KN-1714, KN-1721)
Ultra/Titan (KN-1810, KN-1811, KN-1812)
Viva/Skipper (KN-1910, KN-1912, KN-1913)
Omni DSL (KN-2011, KN-2012)
Extra DSL/Carrier DSL/Skipper/Speedster DSL (KN-2111, KN-2112, KN-2113)
Runner 4G (KN-2210, KN-2211, KN-2212, KN-2213)
Hero 4G (KN-2310, KN-2311)
Hopper 4G+ (KN-2312)
Hero DSL (KN-2410)
Peak DSL (KN-2510)
Giant (KN-2610)
Peak (KN-2710)
Orbiter Pro (KN-2810)
Skipper 4G (KN-2910)
Speedster 4G (KN-2911)
Speedster (KN-3010, KN-3012, KN-3013)
Buddy 4 (KN-3210, KN-3211)
Buddy 5 (KN-3310, KN-3311)
Buddy 5S (KN-3410)
Buddy 6 (KN-3411)
Voyager Pro (KN-3510)
Hopper DSL (KN-3610, KN-3611)
Sprinter (KN-3710, KN-3711)
Sprinter SE (KN-3712)
Hopper (KN-3810, KN-3811)
Hopper SE (KN-3812)
Challenger (KN-3910)
Challenger SE (KN-3911)
Racer (KN-4010)
Buddy 6 SE (KN-4410)
Explorer 4G (KN-4910)
Orbiter 6 (KAP-630)