For some reason I get the feeling that at least the "Liftarm Bracket" is a bit too niched. Kind of reminds me of the worst TLG years back in the 90s where a lot of pieces were specialized and niched in absurdum.
On the other hand, building everything with pins and beams never gets the same stability!
I want to head over to Bricklink and stock up for outriggers to a massive mobile crane - and at the same time stick to classic building and build my own outriggers...
Picture borrowed from Jim's review: http://www.eurobrick...howtopic=111478