Bare in mind always these three thermal-chemical gasification relationships.
Temperature. Need a minimum maintianed there. Too high destroys system material.
Turbulence. Need some to promote the best particle surfaces gasses exchange. Too much does not allow enough exchange time.
Time. The thermal-chemical reactions do take some time to completely occur.
If it helps visualize these as a changeable shape, three sided triangle.
Or as a three legged stool.
IF you change one side; the other two sides must change too, to have the same sum results.
Now factor in additional real engineering challenges like fuel stock moisture content; base carbons-to-volitles ratio; mineral ash %, and the melting point of it's mineral ash and you may have to skew your T,T&T balances to address these.
Some gasifier systems promote one T factor as the Superior to the others. The factory Imberts as ripping Turbulence machines. Dobson's as balls-out Temperature machines. The FEMA's as slow, long pathway, Time-in-a-bottle machines.
Most all, other, as more T,T&T balanced systems.
Ha! They can all be made to work as long as you will let me cheat hand select the fuel.
Base your system around the fuel stock that You DO have, and You WILL use, to make your life a whole lot easier.