Using g-stl and g-vrml result in a crash during conversion (on Windows). Only part of the geometry will be converted.
BOT-primitives will never get converted!
I have commited some code that might help you in the "jbrlcad" sub-project of BRL-CAD. This is a java project. Try checking it out, and running ant javadoc in the top level jbrlcad directory, then point your browser at the "build/docs/index.html" file. Look at the javadoc for the Arb6ToBot class. I have tested this on your radome.g (using a tolerance of 6mm), and it seems to work OK.
Thank you guys, for your great help!
I need to find time for taking a look at the Java code. If it works, it will save us hours and hours of work.