Might be that somebody is interested on a Vegas - DaVinci Resolve Round-Trip without using XML Export.
It's based on a program named EDL_Convert and several scripts which do mainly focus on batch rendering of regions.

I did develope a method which has following advantages:

A) round-trip does also work with Vegas Pro Versions <12
B) rewrapping to DNxHD takes place after editing
C) post edit rewrapping saves space on hard-drive and render time as it includes head and tail trimming of clips up to cut-only length
D) its possible to apply noise reduction and velocity envelopes to rewrapped files, hence before color grading
E) it's quick and frame accurate
F) final edit will contain all transitions like cross fates, black screen pauses
G) it's free

Please have a look at:
http://personal-view.com/talks/discussion/6238/edl_convert-workflow-developement-for-sony-vegas-pro-davinci-resolve-/p1