Glad to hear it’s working somewhat better now after tightening the bottom thumbscrew. Here’s a recent post by @tenoch going further into some setup best practices that may help further: Troubleshooting Cymbal & Hi-hat issues
To answer your other question about pushing the Sunhouse multi-sampled hi-hats back in the mix:
They were recorded with a close mic. You can give them some more depth by lowering their volume and adding a bit of reverb. You could experiment with settings like this:
