Useful and constructive feedback
Cheers Rexy, always good to have feedback from one of the resident prop and texture experts.
Unfortunately it's somewhat inevitable that a couple of mistakes will slip through the net, but we'll just have to address them with an update of some sort in the not-too-distant future. It's really handy to have these things pointed out and I don't doubt there will be a community feedback thread for exactly this sort of feedback.
WRT the excavator, believe it or not, there were hydraulic excavators around in the 60's they just weren't particularly commonplace. Research was done and it was based on an example from the period.
The one thing I disagree with is the Steamroller. I like that model and I think it does look like a slightly stylized version of the real thing. It's a fitting model and it was from one of the key contributors from the pack, not to mention that it was conversation about the steamroller and about other heavy machinery that sparked the idea for a content pack. Also the version in the pack has been updated since the initial release with revised textures, so it's not just a re-release.
Either way, thanks for astute observations and keep them coming.
