Attachments look excellent, really stepped it up Jason!
The standard config ZX870-3 is listed as...
Full machine : 83,500 kg
Counterweight : 13,300 kg
Standard 3.7 stick : 4,330 kg
Standard 3.7 bucket : 3,900 kg
I would think that Rogers trailer is probably only rated for around 60,000kg's let alone even looking at weight transportation / wight per axle laws. You can also see lighter machines being hauled by bigger setups here...
http://forums.dhsdiecast.com/default.aspx?g=posts&t=131002All of that aside though, in 1:50th scale, it looks to be sitting pretty well to me
Rowan.
1:25th scale CAT 375L excavator