Valve spring tester

Anyone use and have a recommendation for a more affordable valve spring tester? The "good" commercial ones a shop would use are near $1000 new and used versions about half that. I'd be a lot happier around $100-$200 because I'm only using it for my infrequent needs. I have a mill, drill press, and arbor press so the actuator and measuring part is covered, I just need an accurate pressure measuring device. I see some relatively cheap ones on ebay and amazon but haven't seen any positive...

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Author: gzig5