Alas, poor Constructicon Maximus...

So Fansproject made upgrade kits for the Energon Combaticon and Aerialbot molds, both of which were pretty awesome. however, the poor old Constructicons never got such an upgrade, and I kinda think they should to be honest.
I mean yeah, you can't exactly make them G1-accurate (as they only have 5 members) but I reckon they could at least make it a better toy. I have Steamhammer and he's a great figure, and I have handled the other 2 Energon Constructicon molds as well (both of whom were a lot of fun) and I think they deserve better. They're already most of the way there- you can already make a decent (albeit clawed) arm out of Heavy Load/Duststorm, and he actually looks pretty imposing even vanilla. All he'd need is 2 new limb molds, some hands and feet, and maybe a few extra accessories to bulk up the combined mode and give them more weapons when separated.
How would you go about making an upgrade for them? Do you think there's any existing characters they resemble enough that they could be made to homage (Sixbuilder perhaps)? Or do you think an upgrade kit should make them into a set of original characters?
I mean yeah, you can't exactly make them G1-accurate (as they only have 5 members) but I reckon they could at least make it a better toy. I have Steamhammer and he's a great figure, and I have handled the other 2 Energon Constructicon molds as well (both of whom were a lot of fun) and I think they deserve better. They're already most of the way there- you can already make a decent (albeit clawed) arm out of Heavy Load/Duststorm, and he actually looks pretty imposing even vanilla. All he'd need is 2 new limb molds, some hands and feet, and maybe a few extra accessories to bulk up the combined mode and give them more weapons when separated.
How would you go about making an upgrade for them? Do you think there's any existing characters they resemble enough that they could be made to homage (Sixbuilder perhaps)? Or do you think an upgrade kit should make them into a set of original characters?