What's the difference between dye-sub and double-shot keycaps?

Dye-sublimation infuses dye into the plastic surface, creating permanent color that cannot wear off but sits slightly beneath the top layer. Double-shot molding uses two separate plastic injections to form the cap and legend as one physical piece. Dye-sub allows more complex color gradients and works on PBT; double-shot is typically ABS or limited PBT colors. For Love Story's multi-tone color scheme, dye-sub was the necessary choice.

Does this fit my Keychron/Varmilo/Ducky keyboard?

If your keyboard uses Cherry MX-style switches — the standard cross-shaped stem — these caps will fit. Keychron K-series, Varmilo VA-series, Ducky One-series, and most custom builds with Gateron or Kailh switches are compatible. Check your keyboard's layout: 75% and 96% boards sometimes use non-standard right shift or bottom row spacing, but the 129-key count here includes common alternate sizes.

Is $79.99 a fair price for dye-sub PBT Cherry profile?

At the $79.99 sale price (from $99.99), this sits in the mid-range for full-coverage PBT dye-sub sets. Entry-level sets with fewer keys often run $30-40; enthusiast-grade sets with more elaborate theming or additional novelty keys frequently exceed $100. The 129-key count and complete layout coverage justify the positioning — you're not paying for a base kit that requires separate modifier purchases.