RE: CA models Extra 27% or 31% for mvvs 58?
I have a CAmodel Extra 300L 31% with a ZDZ 80RV, and a friend of mine has got a Wild Hare Edge 2150mm, with a MVVS 58 with cannister. I have flown the edge of my friend many times. It has good power, but I don't recommend you using the MVVS 58 for a 31% Extra.
I recommend you to put the MVVS 58 on the 27% Extra, and you'll enjoy with it.