Step 9 deals with all the interior details on the turret and focuses primarily on details from the turret ring and below. There aren't any details or add-ons to the interior of the upper turret areas with the exception of the exhaust fan installed in Step 8.
The first details added were the turret traverse mechanisms and while the instructions tell you to assemble the mechanism from its 7 parts first and then install it to the turret base, I did it in the opposite order. Part B8 has two pins that locate to the turret base and getting this secured and solid made it much easier to assemble all of the other parts. The auxiliary traverse on the loaders side was also installed along with two storage boxes next to the commander's chair. The auxiliary traverse and one of the storage boxes had a sink mark that would require putty to fill and correct if showing the interior. There are also numerous large ejector marks, some partially raised, others sunk, that would need to be dealt with as well.
I skipped around within this step a bit, instead of building the gunner and loader's seats and installing the floor plate mounts, I assembled the floor plate details first. These are pretty straightforward items, not a whole lot of detail to them and they all, for once, fit well into their designed tabs. Regular glue was needed for these though as the tread plate pattern doesn't provide a lot of surface area for just liquid glue to create a bond.
The commander's chair, a two piece assembly, was constructed and installed and the floor plate mounts put into place and aligned with the floor plate. The plate mates up with the arms using some slender pins, so I left it on a level surface to set up for a while to insure everything was solid. Then the gunner and loader seats were installed. These have tabs that fit into notches on the support arms and the fit wasn't all that great on the gunner's seat. Combined with the fact that it's bulky and front-heavy, it was necessary to hold it in place for a few minutes until the glue had set up enough for it to stand on its own. It also has a very large, one of the largest in the kit in fact, ejector mark dead center on the seat. In the first photo, one of the front support arms had lifted up slightly, I corrected that after taking this shot with a bit of liquid glue and and some finger pressure.
It's worth noting at this point that virtually every piece of the interior had some flash, even if minor, that needed to be removed with a knife blade. Since they all share the same sprue, it's possible that it was just a bad run, but it's something I had to be constantly on the watch for as it would show up in different places on the parts and test-fitting everything was essential.
Moving on to Step 10, I constructed the base of the cupola with all of the armored glass vision blocks. There are five and each one has a perfectly centered ejector mark on the surface viewable from the interior, so if you decide to have the hatch open, these will either need to be dealt with or you'll have to stuff a figure in there to keep them from view. These assemble easily enough, with a small tab holding them in place and fit flush against the interior of the cupola.
Assembling the cupola itself consists of matching up the bottom half with the top. The bottom has a pentagonal shape that needs to match up exactly with the top, so be careful when doing this to have the right alignment. Even so, the fit is very tight, essentially a snap fit, and required some pressure to get it sit down correctly with just a little liquid glue run around the edge to make sure it doesn't come apart later on. The top of the cupola is also a separate piece and again a tight fit. The underside on mine had ejector marks that had created little dimples on the outer edge, so these needed to be filled with putty so they didn't show around the base once the cupola was installed.
Then it was time to take the big plunge with the remainder of the step and install first the gun and mantlet into the turret face. Due to the spent shell basket, it's necessary to do this first before fitting the turret base, so I only glued the top in flush with the turret to allow some flexibility fitting the base. The base was then installed, carefully going around the perimeter with liquid glue and finger pressure to get a good join. The fit here was very good with just a slight overhang at the cheek plates on both sides that needed to be sanded down. The cupola was also installed, this has a notched tab that aligns it properly to the front and is also a tight snap fit over the molded in mount points on the turret roof. Last but not least, the Rommelkiste was assembled out of its two parts and then mounted to the back of the turret.
And just to be sure that the turret basket and interior fit well, I test fit the turret on the rail car base.
All that's left now are the schurzen!