The fit of these parts is tight enough without glue.
Just take care during installing. It is easy to push on the nylon part during the first couple of turns of the alu nut. That unseats the nylon insert. After the alu nut threads in straight push on the pivot ball to pust the insert back in place then little by little screw in the alu nut till the play of the pivot ball is gone but it moves easily.

Sometimes 1/16th of a turn can make the difference between play and binding....

In general, build the entire car (leave shocks off) and then check the freedom of movement. Like Goldfinger said, intalling all parts can sometimes make a huge difference. The fit of the car is very good (I think ) but we did not want to create free movement with excessive play. As some parts need others to construct the complete suspension it will sometimes seem to bind until you install all parts.

I have got my own car now and during building I thought I found a bad fit. It was in the brake cam. After I took a knife and did some reworking I found I had overlooked the shim in the manual......