Just received an email about Uneek Cap Locker, which seems to be a better and cheaper alternative to ARB Airlocker.
It appears that they offer 4 types of lockers. They include PR Locker, LSD Locker, FR Locker and Comp Locker.
PR Locker (Partial replacement Locker).
This is for those 4wd with open diff and a 4 pinion centre. It reuses existing diff casing and gears.
LSD Locker
This is great for those 4wd with LSD already but also want a 100% diff locked when needed. This will be great for 4wd such as Nissan Patrol which is well known to have the best LSD on the market. Simply swithc a button and you can locked the diff 100%.
FR Locker (Full Replacement Locker)
This will use the CAP locker system with a new 4 pinion carrier.
Comp Locker (Competition Locker)