Leggy beans

True to usual form I sowed my CFBs too early and by the time I got to plant them they were probably a metre long and pot bound.   Now tell me, do you untwine the tangle of beans and plant up, encouraging the long tentacle up a pole, or do you trim the tentacle letting the plant shoot from the bottom.

Also, if pot bound,  do you tease out the roots before planting or not?