Well fellows when the ONLY thing you have is conifer woods - that is what you will learn to use and design around.
Yep. VERY fragile char. Why I gave up on charcoal making dreams! Softwood confers do have a tendency for carbon/soot fines carry through downstream. BUT. Excellent fast energy release. Just have to make the hopper bigger for the lower bulk density. And because of the added hopper capacity moisture thermal/quenching then created: must religiously pre-dry the wood; and/or have an excellent hopper condensate removal system.
Why Wayne's huge soot dropping/exchanger and extreme hopper condensation systems.
Oak wood - different set of problems. So a system biased for different solutions to oak "problems".
Just like a peat fueled system will be different yet. Have to handle the low temperature melting/slagging high percentage ash.
The good news is ANY and ALL natural woods can be used for wood-to-shaft power.
Just the more a system is biased designed for one extreme type fuel use the less it will be able to flex use well at another extreme type
Woodgasifier like the best of people should be as resiliant/flexible working as possible, IMHO.
No one really likes PrimaDonna's. Pretty to watch. Hell to live with.
As my Mother-in-law would tell my darling wife, "Melinda, there is only so much bacon on a hog. You must learn to eat the other parts too".
Do not pine away for a wood you do not have - would/do; with what wood you do have.
J-I-C Steve Unruh