I have 2 of bernies boxes IB5 the first shat 1st and 2nd syncro ring and a selector fork,the rest of the box was mint when i looked at it mainshaft etc Nice mod there bernie ( main shaft),the second is still goin strong,best to have 2 so when ya bust 1 you have a spare lol.Must say the amount of abuse it took before it bust was well hammer time lol