I forgot one thing about GM.
This kit is very old and entire shape is too simple.
I have got a RX-78 Gundam kit from same line up with GM, but I think Bandai remade the mold, and it's detailed and nice.
I decided trying to duplicate "maru-ichi" mold and use it for GM.
These parts are duplicated using resin.
I put those parts to elbow, knee and ankle.
I think it is much better.
I checked two kits together, and it is looks like below.
Next,,,,I will get on with the most difficult work in the assembly of this kit.