Look up still it (https://youtube.com/c/StillIt) on YouTube he does a bunch of stuff on YouTube with bearded and bored, and with barley and hops. But he has a step by step tutorial to building a new column. It not hard it you can soft solder at all. You can find the ferrules pretty cheap on eBay or Amazon. I have even used the cheap sight glasses and ordered new longer boro glass for them. Then just used normal threaded rod being its on the outside and not coming in contact with any vapor. You can get the sight glass for like 30 on Amazon(LOZOME Designed for Pipe OD:38mm... https://www.amazon.com/dp/B08N197SMD?ref=ppx_pop_mob_ap_share) and the boro glass for under 20 plus shipping from mountain glass in Ashville NC (https://www.mountainglass.com/Import-Extra-Heavy-Wall-50mm-9). I know its says 38 mm for the sight glass but it fits the glass tube I've used it before.