I totally agree with the sumi otoshi side for the "chi kokyu" part.
For the "tne kokyu" part, you are certainly not wrong in my opinion, but I prefer to associate this part with the hand that goes near uke's elbow for ikkyo.
Sometimes when Im on these boards I feel there is an apsect of Aikido Im just not learning.
Seriously some terms are thrown around casually like common every day words - and I havent seen them anywhere (training syllabus, etc)... Is this more the philosophy side of aikido? (Or are they techniques?)