I beleive what Don is trying to say is that spped and developing tests will have to be more accurate for use with the UV light than with the regular azo/light bulb combination.

I agree with him, measuring UV vs transmitted light (blue channel) can mean as much as a stop and a half in absorbption, with the concurrent increase in b+f absorbtion.

If roll film is to be used to be enlarged onto azo, I feel accurate film speed and developing test will be of great value. While DBI is an useful tool, I dont think it is the best choice for negatives to be enlarged, specially with ABC.