My favorite thing she did was the flick "China Cat" which wasn't a loop, but a fully scripted feature. Eileen Wells did have several features. She just happened to work at a time when loop porn was the in thing. Most of her features were in the latter half of her career when there were more fully scripted movies.
A lot the actresses that did these video, were very uncomfortable doing these, because it was painful. They had to fake their liking of being skewered.