Threads for the nutt done, transmission and exhaust mounted and car running.

I have fear of a new failure. The intermediate bearing support is quite damaged, could it generate a new failure?
The single piece aluminium shaft is not dangerous for the gearbox/differential? There are not any vibration absorber or flexible parts (coupler, intermediate articulation...)?
Did you notice some strange noise when the rear part take a bump on the road? I think you are making an overexerting the internal transmision/differential bearings, as you are coupling two axis which are not parallel, donīt you?

Thank you!