The replacement of the spring hanger bolt does not matter I think?
There is only stress to the rear as the suspension wants to flat out. With mine I tried to keep everything m10 and snug.
So even if there are no nuts it will stay in place I think.
This whole setup is for Japanese 5000 kilo trailers but here in EUrope it is max 3500.
I have driven a few thousend kilometers with 5 peope and gear but no movement or wear signs at all.
Luckily this is a once in a lifetime experience
new brakelines

new gearoil bolt with magnet

new swaybar connections

new extra strong bolts/nuts (DONT GO CHEAP ON THESE!)

new exhoust ;p
new electricity crap

new breather U-line switched from metal to rubber

new diff breather with filter

new second hand spare wheel carrier with fixed up release/lift working...
fuel tank painted (no recall overhere) ;p
new fuel lines 5x



