My two cents.
I always try to put the ukes elbow to his/her nose while keeping my unbendable arms in front of my center (as always) when taking the uke down I look for his weak line as my Sensei calls it. This line stands at a 90 degree angle on the line between the ukes feet.
Also the uke has to coorporate otherwise you can switch to sankyo or my favourit hiji kime osae. (That one is mean!! I love to do that when the uke doesn't bend his elbow)