I have a large box stove with a pipe for an eight man.
I now have a Sawtooth and I have a small box stove with the right pipe for that shelter.
This winter I want to run the big stove in the Sawtooth. My options as I see them are;

Spend $70 for a large stove pipe of the right length for the Sawtooth and make the hole in the stove jack big enough for the larger pipe and thus too big for the small pipe.

Run the large stove with the small pipe using a reducer to bring the stove outlet down to the size of the small pipe.

Try to use the small pipe by making it big at the stove and reduce it down to fit though the stove jack hole.

Does anyone have suggestions on this or other ideas?