I think this is a tehcnique thing...here goes, my maw got me an acoustic steel strung guitar for christmas this year, it came as quite a surprise that she had done this as she knows of my love for the bass and that i was planning to purhcase a not so good 1/4 size nylon thingy from argos later on. anyway, this has toughened my fingers right up, (on my fretting hand) and has improved stretches already. i would recemmend investing in a cheapo guitar. it also helps you to understand music a little better when you play one more instrument and guitar is pretty accessible so why not? what are you views on taking this up for a second instrument?