which method is better(reflux or push/pull tank)?

[omid_safari]

are they different in amount of pe/i/rp materials?
swim always use a plastic ballon in ice water as reflux.
but clean up inner lyer of ballon is impossile and he use new ballon on next reaction and he must cut all hoses.
he think push/pull method is easier way but swim think about that in the push pull tank HI dissolve in water of tank and reduce yield of meth!