I agree with the assessment. Not for the uninitiated.
I would probably not have tackled my own (M117) if I hadn't had the opportunity to help out and get some hands on experience at the local shop. The shop owner was right in the middle of an M119 chain, when I stopped by, next thing I knew, I was hands on helping out (wifey was wondering why I was late from work

). Not sure I would want to tackle an M119 at home by myself and I'm not afraid to tackle many jobs.
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Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.