I just checked out that website. Saw some interesting stuff.
Seems hara has his own chassis.
Heres what I got.
With purple vivid high rigid ジƒ…ラシャーシ in sharper running.
Approximately, it cannot overlook either the light weight conversion of 20 g.
Not the best translation but it says its 20g lighter. The question is over the superchassis or standard?
It says also on the front page duralmin. So is it duraluminum?