No offense but that kit is pricey. But, might be better for those without soldering and construction skills.
About $12 in sma connectors, round file (dremel w/round sander attachment be helpful but not required), soldering iron and little patience, you can have a much better (and looking) mod:)
Remove the old ts-9's, replace with the PCB SMA connectors ( https://amzn.to/3j6oIvK ) and very stable setup.
If I had one of these hotspots, would make a quick tutorial. Maybe that be a future project. Will be flood of them on ebay after the home schooling dies out...