I finally got all four together, so I took a commemorative photo. As with all prototype mecha, this series had a lot going on.
Zogok: Repaired cracks in the joints during weathering with brass and baking soda glue.
Agg: First full-scale joint repair: Separation using magnets.
Agguguy: First full-scale mixing: Made my own eyes, heat rod, and many other parts.
Juaggu: Nothing in particular. If I had to pick one, I'd make a part to plug the PC hole in the hip joint.

Assembled prototype mecha for the Jaburo attack | ひっさん's Gunpla works