To beginners I usually put the staring question:
How do you want to handle 8 gallons (~30 liters) of soot?
I do not question: How do you avoid handling 8 gallons of soot!
Starting point = reality.
Abrupt; I see you found my earlier writing. Please put it out in full length!
Well, the soot handling: In the twenties the best soot handling was split in 5 stages, now a decent cleaning system can be done with 3 or 4 stages.
Coaxial two-stage Thien cyclone
SS metal mesh tube filter
Washing-boiling + condensing cooler
Wet Open cell mattress filter (in a chest)
A smaller version:
A Thien two-stage coaxial cyclone
Washing + condensing cooler
The available space is a non-compromise factor in most mobile cases.