Dear Harold, my company StrucSoft Solutions (www.strucsoftsolutions.com) has a software program for creating, editing and managing DSTV files called CMS. It is available standalone and as a plug in to Inventor and Autocad. We are hosting a webinar tomorrow (Thurs. 7 March). here is the registration link if you are interested: https://attendee.gotowebinar.com/register/6739779028072084736
