Nautilus Plus in Oregon City has two leg raise stations which are specifically designed for the position you've mentioned. The pad at the back is long enough to support your back and qlutes. Rather than just a bare bar you rest your forearms on a flat pad. It is very comfortable to use. Somehow the Ab Coaster is a slightly different movement. The trick is to do these with a very controlled motion. like with other ways of doing leg raises, there is a tendency to use momentum rather than muscle to lift the legs.
yes,,and jay I should have been more specific I use that one too your hands are on pegs and arms next to body,,,with the dip machine and reversed and sitting back tail bone to bad slightly bumping into it to support them arms stretched out like normal leg raise and then no swing like a cheat version but it works,,,my abs are strong 'core'aspect but lower body legs are heavy its tough ,,i'm a wimp cause I see pro in pictures like haney doing them no problem and they were massive..