Thanks for showing an interest in my work, I really like the way this logomark turned out as well ;)
do you mean to reference
#35 &
#36? Absolutely... I typically prepare a finals package that includes a full, reverse, and one color option in various formats (vectors, psd's, and transparent images) so you have plenty of flexibility in the files...
#35 being the full color (over white/light) and
#36 being the reverse option for when its displayed over the dark gray...
Thanks Dennis