For those who want to do koshinage with feet wide -- try to throw uke that weight 150 kg . LOL. I had such pleasure few times -- one learns fast to get legs together otherwise one will injure himself.
Been there, done that. Many times. Honest. No big deal. Of course, if you try to lift
uke, you will collapse... but if you swing your body, oh, then you've got the "throw"
. Come on Szczepan, you know what I mean. You don't need that springing motion you describe (nothing wrong with it, just you don't need