The hollow bottom of the grey backing part (which would have been covered by the conical bottom part) has been filled with Apoxie Sculpt and sanded flat
U9-C4 also has an extra projector on the top of his dome - made by drilling a hole and inserting a section of brass tubing, with another piece of styrene rod inserted into the tube
A model of U9-C4, one of the droids of D-Squad as seen in four episodes of Season 5 of the animated Clone Wars. U9-C4 is an R5 series droid but with differences to the head shape compared to R5-D4 seen in the original movie and The Mandalorian. This model has been built by modifying the R5 part of the Bandai R2-D2/R5-D4 kit.
