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Perhaps the lift shafts that are used in pop top camper shells gotten from a scrap yard? About 3ft worth of up and down movement but they end up 6ft long. The only other would be slip fit plastic pipe running air pressure or hydraulics. See homemade pipe squirt guns.
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casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
Last edited by Piotrsko; 10-15-2022 at 10:43 AM..
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