>>5260764According to these threads, UW Menasor's Motormaster has fixed hip joints, as do any Motormaster's with an embossed code on the back beginning with 5. Or you can buy replacement joints for him, and install them yourself if you think you're capable of doing so.
Nothing's gonna fix Blackjack, the chestplate thing is just shit.
And if Deadend's legs are shit it might just be your figure. I haven't heard of any problems with him, at least here.