I've never had a single issue with my plastic GMade gears. They're tougher than some shitty metal gears. But, I'd still rather have upgraded metal gears in a rig like this.Not sure about any Gmade gear issues , plastic or cast.
As far as plastic arms go, sorta like axial rtr Yeti arms? The chassis mount servo is different than a bomber ? Optional on Wraiths
Hang up and Drive
Plastic trailing arms on RTRs is common. Kits, like the Bomber, have the aluminum strengtheners included.