All D4R-II ordered from QuadQuestions have been updated to 27ms.
As for the CC3d, it’s hard to say. It’s not something that we sell, so it’s hard to determine the issue.
I would recommend that you: “check drivers, check usb cable” Beyond that, it’s hard to tell why you have connectivity issues. Perhaps a CC3D expert can chime in?
We would love to send you a coupon to get you into a flight controller that supports Betaflight. – if interested, email support@quadquestions .com
Our Taranis are upgraded with many models and a better voice pack- this can help you get setup fast and with ease.
Please let me know if this answered your question and if there is anything else that we can do for you in the future!