Generations Battletrap custom WIP

Hey Guys
I am in the middle of designing a some parts to make a Custom Duocon Battletrap that isn't a triple changer like the recent update by Fun Pub. But an actual two vehicle forming one robot figure like the other customs that have been posted before.
I am just not sure about whether I should just continue to stick with the helicopter alt mode or go to a Terminator style flying HK like Generations Sandstorm is?
I have found some pretty good references I think I just need to make an executive decision about what alt mode to go with.
Any help would be great?
I am in the middle of designing a some parts to make a Custom Duocon Battletrap that isn't a triple changer like the recent update by Fun Pub. But an actual two vehicle forming one robot figure like the other customs that have been posted before.
I am just not sure about whether I should just continue to stick with the helicopter alt mode or go to a Terminator style flying HK like Generations Sandstorm is?
I have found some pretty good references I think I just need to make an executive decision about what alt mode to go with.
Any help would be great?