Good job taking the risk. If you're like me, you were pretty nervous getting started...
When I got to the stage where you are now, I just kept using more Citristrip. I left it on the wood to do its work and kept scraping until I got all of the finish off. I ended up having to use a metal putty knife in places. I really wanted to avoid sanding because it would potentially change the geometry of the stock. Eventually it all came off, although on one of my stocks there is a tiny spot that I just couldn't get off. Ultimately it isn't noticeable, though.