I'm not claiming to be an expert in oly lifting, but it seems to me that you aren't getting full extension because the weight is sort of being flung foward. Although a person's hips are pushed back on the decent, full hip extension will keep the bar close to the body because the trajectory will be up and not forward. I believe more postieror strength will help your form.
While I no doubt need more strength everywherre, it's hard for me to think 100 lbs is taxing my hip extenstion. I can deadlift a measely 318. Sucks, but still. I'm trying to jsut let my arms hang and let the momentum from the hips/ankle/shoulder extension pull the bar. I'm trying to not turn it into a front raise (while the bar is light enough to do that) Maybe I need to let the elbows bend more, to the outside (turn them outward?)
I appreciate the input and I will take it all in.
Even those that can't appreciate my awesome.