Let's continue a bit.
The only difference between the Impress chassis kit rear pod and the one from the older F1 is one screw hole, which on the Impress serves to mount the multidirectional friction damper's central post.
On the older F1, this central post attaches to the top deck, with the multidirectional friction damper's flat middle section attaching to the rear pod instead (basically the inverse situation of all more modern F1 cars), using a hinge of which the shaft fits into the upper screw holes of the front pod section:
(very practical for maintenance
The t-bars have the same shape, with the Impress' t-bar made from somewhat stiffer white fiberglass:
Anyway, since the t-bar is the only suspension option on the old F1, I'll attach it to the pod:
Theoretically, at least, it should be possible to use the rear link parts of the Impress link suspension kit on the old F1 chassis, as all of the screw holes used are the same, but because the top deck is different the additional tuning options provided by that kit can't be installed. This would mean there would be no option for roll control.
On the old F1 kit (and also standard Impress kit), the t-bar attaches to the chassis using two plastic parts (the classic o-ring suspension):
The front part has holes for installing tweak screws, but no tweak screws are provided. Looks like they need to be quite long, 5-10 mm. However, the plastic parts apparently cause a problem that is sometimes also seen on very abused second hand Tamiya F1 cars with badly tightened top deck: bent screws. Too much play in the screw holes?
So instead I will be using option FJW-4, Special Mechanic Post:
This replaces the plastic parts with machined alloy bridges and screw-on alloy posts, and it also includes fresh screws.
(Note that the FJW-4 instruction sheet shows the awful original plastic chassis, to be avoided at all costs. Just replace it with the carbon chassis)
That looks better.
Then I added the rear body mounts to the top deck (use short screws), and installed it onto the car:
The top deck is placed in such way that the battery will be located to the back of the centerline of the top deck.