Migrating old quiz banks to the new quiz engine:

I have about 100 different question types, each with 5 versions. These are ones I've made myself--they are not from a publisher's question bank. That makes for 100 question banks--one question type per bank. When I create a quiz in the old quizzing engine, I create a question group, select one of the banks, and it picks one of the versions of that question. So each student gets the same question types but different versions. So how do I import all 100 question banks, each of which has 5 question versions, into the new quizzing engine? On these help pages I've seen things that seem to imply I must create 100 different single-bank quizzes, each of which pulls all 5 questions from a single bank, export each one individually into its own QTI file and then reimport each quiz separately into a new quizzes question bank. x 100.  Is this really the way Canvas wants us to migrate to the new quiz engine? Is there even a slightly more efficient way?#