Issues 7 and 8 of the Hachette partwork adds detail to the rear chassis that was formed in issue 6.
They add a another set of steps, some rivet strips to portray how the steps are attached to the chassis, the tender drawbar and most noticeably, axle boxes. The rear chassis is then attached to the main chassis.
Since the last post, I have decided to not add any kind of suspension or compensation, so have soldered the axle bushes into their holes in the main chassis. Although some of the methods seemed fairly straightforward, I have three other O gauge locos to build, and doing so here would end up with me procrastinating with this build and never getting to the others.
As with the previous issues, these parts went together with no problem, the only slight difficulty was that the axleboxes required a fair bit of filing to remove some feed channels, which had to be done very gently to avoid breaking the two spring hangers.