I hope your Kui is better than the unit Scans Tech sent me to review. That thing was a POS. Heavy, not very well put together, 510 was awful, auto-fired with button tops, and you'll likely want to toss the included atty straight in the trash. I did read, however, that Scans made some key revisions and released a Kui V2. But, I've also heard Scans stopped Kui production awhile ago. So, either they are back in the game or FC bought a bunch of old stock.
I never ended up publishing my review after Scans stopped responding to my questions.