> just disable the joint from the body
>
Yeah, but that would disable all joints connected to the body, not only the arm..
R239 Capx
i re-attached the limbs to the body on a order where you wold be able to cut them off without worrying to much about the body flying away... however no matter how many times you edit it..
the problem is this : each Original point 0 is the point of gravity or point of weight of an object if you move it down the point of gravity will pull from that part
imagine, you have a stick inside a iron ball and you can slide up and down the iron ball, wherever you move the ball that will be the center of gravity for the stick from now on...
thats how image point 0 works... its complicated... to explain in forum chat... but i hope you get my idea...
also object position in Layout editor matters when you create the joints... if positions are irregular then joint will be either to long or to short thats why the weird shakings and all that....
image the joint being an invisible rope. hope my logic of it made sense to it... and the capx helped you in your project.
Edited: also density which affects the way of world gravity and object heaviness is direct proportional with the density value you input and the size of collision box .... also the origin point 0 you have to have it dead center on X axes if you want things to be balanced...
but not on the center of the image... but on the center of the collision box.... image the collision box as being the filled material of the iron ball from the above stick... if the ball is missing one part then its weight and gravity point changes ... physics behavior is very complex to explain... ... need to make a live feed for it or record a entire video.