Good discussion. I think more approaches and thinking on this issue can only be positive, success and failures all add to the body of knowledge.
Kristijan, brilliant concept and execution! The video is unequivocal proof. I agree that motors shouldn't be considered disposable, I know I like mine to last. Conceptually I can agree with Steve U that for a first gasification attempt, that engine should be considered disposable.
I would like to hear data on how much vacuum this system adds, and compared to other filtration systems, and post scrubber tests for any particulate. (But I can't imagine much getting past your scrubber).
I am sure we will have reports in time about how often the scrubber liquid needs to be cleaned, and disposal issues.
Settling followed by wick siphoning should be practical to periodically clean soot, tars and ash from the liquid, allowing re-use. Or how about a centrifuge?