Why won’t my pilot extender fit?

First video in the series of measuring, testing, and answers.
For custom torque converters call, message, comment.
Tampa performance inc [phone]
Current special promotion.
Free Chinese pilot extender to first twelve customers who purchase a converter and want one. Limit one per customer. Some modifications required. Limited to 12 in stock items.

[@v8tergt653]

One thing I learned when machining is that they test the fitment right away and the heat while machining will make it seem it’s correct, but once it cools completely down it’ll be off