So those two pieces were almost welded together. 4 foot chain wrench lots of heat 6 ton press and it gave up a fraction at a time..45 mins workout and I managed to save the coupler..mostly..just because a new one is 3 weeks delivery and it's riding season here....will order new ones anyway along with shaft and midshaft etc. JM got me covered, thanks Chris...chat later. Thanks for all the advice guys, as always very much appreciated.