Relating to Carl’s post, I think the three months I’ve worked on Bochsa (the book that’s all in Eb) has improved my ability to feel where the strings are a whole lot.
When I began lessons 2 1/2 years ago it drove me crazy that I couldn’t develop finger patterns but the repetition in the Bochsa forces you to do so. It’s not hot fun, but for finger skill acquisition, I love it!