Door-Handle Tolerances in a Brass Sphere: Why Felix Ure Scored 9 for Discovery

Made the cut

Felix Ure Felix Ure Titan Brass Puzzle $189.99 Scored 8.3 / 10 View Product Page

Felix Ure spent five years as lead designer at Joseph Giles, a London firm whose work goes into Royal Family projects. He has a BSc in Product Design and learned what fractions of millimeters do to how brass feels in a hand.

In 2019, he turned that obsession into the Titan: a 50mm solid brass sphere, CNC-machined from a single billet in his Wimbledon studio, with zero seams and zero visual clues.

The goal is simple. Open it.

We scored it 8.3 on the SleekNova Scale. The discovery dimension, WOW, scored 9 out of 10. This is the research behind that number.

What WOW Measures and Why It Scored 9

WOW accounts for 35% of our final score. It measures how likely the recipient is to have seen this product before, how deep the maker story runs, and whether the gift belongs entirely to the giver as a discovery.

The Titan scored 9 because it occupies a specific gap: famous inside the mechanical puzzle community, invisible to mainstream gift guides.

Puzzle Score calls it one of the most incredibly hard puzzles they have encountered. YouTube solvers have filmed detailed breakdowns. Yet searching “brass puzzle gift” or “unique gift for engineer” returns zero results for Felix Ure on any conventional gift platform.

The discovery belongs to whoever finds it.

The Joseph Giles Connection

The Titan did not emerge from the puzzle world. Felix designed door handles.

Joseph Giles is a high-end London hardware company whose work appears in Royal Family projects. Five years in that environment teaches you what CNC tolerances do to tactile experience. A door handle that feels right differs from one that feels cheap by measurements most people cannot articulate but everyone can sense.

Felix found puzzles on YouTube, spent three years engineering a mechanism that defeated him as a novice, and launched the Titan in 2019 from his Wimbledon studio. Every unit is individually hand-finished and quality checked by Felix before dispatch.

How the Mechanism Works

Two internal bearings roll against CNC-machined notches positioned at 45-degree offsets. A small pin in the lighter half provides directional control. The solver must position both bearings simultaneously into their notches to separate the two halves.

There are no visual clues on the surface. No seams to trace. No markings to decode.

The solving interface is entirely auditory and tactile: clicking, rolling, and settling sounds that change with orientation. Most people need five to twenty-four hours.

One reviewer on Puzzle Master described dreaming about the solution, then waking to find the sphere still closed. A French reviewer on Puzzle Score worked on his for three years during office meetings.

What We Verified

We traced every claim in our product file to its source. The Titan is machined from solid brass, measures 50mm in diameter, and weighs 515g. Confirmed on the official Felix Ure site.

Three years to develop. Confirmed by Kubiya Games. Named after Saturn’s largest moon. Confirmed by Puzzle Master’s product description. Brass left unfinished to develop patina from handling. Confirmed on the Felix Ure site.

BSc in Product Design, five years at a high-end door hardware company. Confirmed on the Felix Ure about page. Lifetime warranty on every product. Confirmed on the Felix Ure site.

Every factual claim in our scoring traces to a verified source.

Where Trust Scored 6

Trust accounts for 15% of our final score and is derived from our confidence metric. The Titan has 21 verified reviews across four platforms: Puzzle Master (11 reviews, 4.6 stars), Amazon US (6 reviews, 4.8 stars, Verified Purchase), Kubiya Games (3 reviews, 5.0 stars, Judge.me verified), and Team JB Hobbies (1 review, 5.0 stars).

That is thin for a $190 product. We scored confidence at 60 out of 100, producing a Trust score of 6.0.

The sole one-star review on Puzzle Master addresses packaging condition, not the puzzle itself. Every five-star review describes the build quality and solving experience in specific, personal terms.

The signal is consistent. The volume is limited.

How We Matched This to Gift-Givers

We matched the Titan to the hard-to-shop-for recipient. The person who already owns the best version of everything conventional. Leather, tech, spirits: exhausted categories.

The Titan exists outside all of them.

It is not a desk toy (though it functions as one). It is not a decoration (though solved Titans earn permanent desk spots). It is an engineering challenge in 515g of brass from a solo maker who answers every email at info@felixure.com.

The Craighill Jack Puzzle is the closest comparison in our catalog: CNC brass, desk sculpture, patina with handling. But the Jack is a visual assembly puzzle solved in an afternoon. The Titan provides zero visual information and takes days.