Nice first print. You can expose longer to get more highlight detail and deeper blacks. The self-masking property will keep the shadows from blocking up. You might try doubling the exposure time.
I will try that. The exposure time was 3-1/2 minutes in a UV Box. I do want to try a sunlight/shade exposure.
I used a digital negative, from a 4x5 negative.
If you or anyone thinks that you can see possible contribution from a less than perfect negative, please do comment. On making the digital negative I do "crank in" a lot of curve to darken/contrast the negative.
It is a CMYK type of thing, and use C = 0 M =95 Y = 95 K = 0
I uploaded the Dig. negative to my smugmug, if anyone cares to view it and comment.
http://bryanspeed.smugmug.com/photos/505051356_p9tf3-L.jpg