>>5372955(dont have camera here with me so excuse the shitty LDD mock-up)
I basically just moved the tail back by replacing the blue pin on the ball piece on the back of his torso with a grey 3 long axle (though one of those pieces that is 2m of axle with a pin at the end (featured on LoSS and Kulta works better) and replaced the tail with a gear to operate the mechanism, this was all pretty subjective stuff really. I found it made the torso not feel quite as tall and just more well balanced to me. Though the arms don't hold their positions as well without the tail resisting their movement.