Excellent! I am glad that your research has indicated such. Rosy Boas are especially sensitive to humidity levels that are in excess of their preferred range. Many species can tolerate a wide range of humidity levels and this makes it easy for us to keep them and never see any ill effects. Rosy Boas, however, have major problems with regurgitation if the relative humidity is even slightly high. I suspect BCIs would have problems with the lowered humidity that Rosy Boas require.
Cheers.