Both brands work very well. I would get an occasional FTE with the Kadet until I modded the ejector according to the stovepipe sticky. Fixed that problem.
The Nelson Custom conversion takes a while to get and takes a while to get, but well worth the time the time and money. Plus their customer service is excellent. Somebody always picked up the phone whenever I called and answered any questions I had.
Nice thing about both conversions is they are both very accurate and work as long as the ammo goes bang when I pull the trigger.
Pete