Hi Steve! It's very cool to see a fully-printed ROTK out in the wild! To answer your question, since pre-approval isn't part of any formal process, there's no specific time-table on response time. Essentially, you're posting your build for others to comment on with feedback. At the end of the day, your local GML (Garrison Membership Liaison) will be the one to give final basic approval, so you could also consider sharing this post or your photos with them for initial comments.