Welcome aboard, Matt.
If the stove won't stay lit after an ash dump, then you likely don't have a high enough fuel level in the fire pot prior to the dump. Have you tried increasing the feed rate a tad?
Here's the WIKI page for technical information on the stove:
forum.iburncorn.com/wiki/index.php/BixbyFAQ#Feeder_Wheel
and here's the related WIKI page for general stove information:
forum.iburncorn.com/wiki/index.php/Bixby
If you change the feederwheel, you'll definitely need to change the stove's programming. That's because there will be a different number of feedwheel turns to accommodate the larger but fewer feedwheel pockets. You'll be venturing into new territory, so the wisdom of Mike at Bixby will be helpful. I wouldn't attempt the conversion without first checking with him. To upgrade your stove's programming, you'll need Bixcheck software for that, downloadable from Bixby for free.
forum.iburncorn.com/wiki/index.php/BixbyFAQ#BixCheck_Software
You'll also need a cable as explained in the same page. When you speak to Mike, tell him your s/n and ask if your board has a bootloader. If not, you won't be able to upgrade the software through Bixcheck.
Wishing you success and I'm hoping that you'll keep us posted on your progress.