I have a bent rear derailleur cage (ultegra Di2 6770) and was wondering if I can simply swap it with a same model 6700 ultegra mechanical cage.

I've been reading threads of people swapping cages for longer/shorter road and mountain groups, etc on other sites, just want to know if this is doable.

Thanks

PS I will try to straighten it, but just in case that doesn't work.