Top Down Fires (upside down fires) - how to light them and why they work

[Butcher]

We don't get much smoke anyway as the stove has a smoke control kit

[Zak33]

We don't get much smoke anyway as the stove has a smoke control kit

All that means is that you cant close off the air flow too much.

It's not a gadget in the flue or anything. Most stoves have one now, and it's to stop you restricting the air flow too much.
Some are a metal sleeve on the air control valve that stops it pushing in. Some a metal bracket to do the same.. to stop and air vent slider moving all the way closed etc.

It won't actually stop smoke. If you choose to burn wet wood at a low temp it will still smoke like a..... well. a chimney

It's worth checking outside see how you're doing when you first start the stove