Drawstring Slide Lock Clasp (Stronger Version)

Remix of [Drawstring Slide Lock Clasp by slarochelle0769](https://www.thingiverse.com/thing:3765600), who created this support-free version of the original version: [Drawstring Slide Lock Clasp by ColdExtruder](https://www.thingiverse.com/thing:2851794).

I made the knob of the catch a bit stronger by scaling it to be more oval. Everything else is left unchanged.