I’d fashion a nozzle adapter from masking tape and connect your Henry to the sander (other less effective vacuum cleaners are available).
connect your Henry to the sander
Can Henry retain the dust? Thought a lot of it would be very small particle so will go straight out again?
Extension hose and put the Henry outside.
With a bag they are good, but a wei or dry vac through water is the best.
@Howard started
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I’d fashion a nozzle adapter from masking tape and connect your Henry to the sander (other less effective vacuum cleaners are available).