Following, I'm curious as well.
I've converted my 4.8 to coilovers but have thought about adding the rear bags back on for towing. Put a manual switch on it maybe.

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04 E53 4.8
98 E38 4.4
04 Touareg 4.2 (x2)
87 E30 (getting a 4.4/6spd swap)
89 E30, selling it
96 E36 parts car
MK2 jetta with a 1.9alh swap
90 XJ Crawler
2000 XJ crawler in the works
63 Ragtop bug
64 Bug
06 F-350 to drag all the above when they brake.