never use a wood prop on a 4 stroke, they are not heavy enough and dont give a good enough flywheel effect, i have seen engines that will not idle with a wood prop and are fine with a heavier prop.

regarding the tracking,at revs the prop flex and forwadt pull and centrifical force will change everything and you can only hope that the prop thickness and material density are identical side to side

you can see this happen when you rev the motor, much more important to balance the prop including the hub, i allways err on the side of the hole being larger than to tight, as far as the aeroplane

shaking this varies with different designs and manufactures, all will shake to a degree at idle but smooth out as the revs increase, arfs seem to shake more than a sturdier built kit or scratch built

imho
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