We were driving on the track with my bro and even though it's not a hard track he lost his rear dogbone,i know they have much play on them but i didn't expect it to go off,we installed it again using fuel tube to put it tight and now it moves only if i squeeze it with my fingers on the small piece of tube.
Is it too tight or OK??
[Could it be because of better set of tires and more stress on the dogbones? He has just installed the medial pro pikes peak and traction was much improved!]

On my car now i managed to break the pull starter for 5th-6th time i can't remember, so i just plugged the hole and made my custom starter box using a motor from a radiator fan of a car(pictures soon when i make it more "decent"!
Started it up and by the end of the 2nd tank i noticed that one of the two o-rings on the spider diff was gone.But i didn't notice any leaks or anything,will it be ok or should i buy(and where?) a new o-ring?