Just had a thought about how you could salvage your cross draft gasifier to run on wood. There was a design in the early 1900s that was essentially a cross draft wood gasifier fed into an updraft charcoal gasifier.
The unit consumed more wood than charcoal. Secondary air was added between the wood gasifier and the charcoal gasifier. The wood gasses were burned, which heated the charcoal to glowing hot. The hot char would crack any remaining tar as well as combine with the CO2 from the wood gas to form CO. The charcoal also functioned as a filter.
There should be a picture here.
It’s the one in the middle on the right.