Morning Dave
Yes certainly sounds like you have few busy weekends, yes BMW would say you need to change the whole arm just for a Bush,
Well yesterday I replaced 4 and 5 injectors and I noticed a broken pipe so I replaced that and now it runs smoother and there's no smoke thank goodness so you was correct.
Now I have a suspension fault but I only noticed as someone turned it off in the lcm part of the program, bonnet needs respraying and this fan belt type of noise but as you said i'l wait till the better weather now, as my partner will kill me as I keep buying all these tools lol.
Simon