Gunpla Model concept art question

[Calubin_175]

I am curious to know who designed the concept art for the HCM Pro line as well as some of the ver 1.5s and ver.2 MGs. I know that the majority of MG designs were conceived by Katoki, with the exception of GM, Zaku, the G Gundam line and C.E ones done by Bee-craft. Zaku II Ver.2 is definitely designed by Katoki since its proportion is identicle to Katoki's F2.