When I started looking at P38s, I started also looking at forum to see the various stories and issues, and solutions.
Most of the info is very old in most cases, in some places which go back many years.
When I browse around in English, I've found aulro.com to be very informative and balanced, and pleasant. I went through ALL the pages of their P38 section .... (this is something I usually do with every vehicle I own!)
When I went to landyzone or rr.net I've noticed a distinct different vibe ... I actually went through a few pages and never bother with the rest. Bad attitude ... some guys in LZ would not even want to meet :-/
For rr.net, nevermind (with all due respect) US-based forum have next to nil usefulness to anyone living outside their world, for various reasons.
I don't recall the site, but the French have a very complete and well-behaved forum. Only in French (of course!) and you need to go through a translator through it.
But the pub ... this is the most cozy place I have ever been, and I've been in forums for +15 years and easily maybe over 30K posts.
Amazing vibes in here, no trolling, no flaming, and especially when dealing with a vehicle 99% of the motoring world (knowledgeable and not) considers utter crap, and a lost cause.