I suggest don't use 4 gear in the diff. Just the Putty is FULL is ok. it can make the Diff. weight ...
所以準備咗x ray嘅膠牙及十字pin,
輕過原廠兩隻金屬牙好多,
係唔知襟唔襟啫,
不過以部t3嘅測試黎講,
應該不用擔心
just weight them,result is
original alu. shift + 2 metal gears,2.9g
x ray plastic cross pin + 4 gears ,0.9g