SKXMod Ana-Digi Tuna Modification Kit Review: Turning a G-Shock Into Something Unique

Introduction

The SKXMod Ana-Digi Tuna Modification Kit is a full conversion package that turns a standard Casio G-Shock into an analog-digital dive-style watch with a much larger presence. The kit includes a thick titanium case, a black shroud, a unidirectional dive bezel, a chapter ring, replacement hands, and most of the tools needed to complete the swap. It is designed for the Casio G-Shock B2100 model, a solar-powered Bluetooth watch that already offers solid functionality but suffers from poor legibility in low light because the hour markers lack paint or lume.

This review covers what comes in the box, the assembly process, build quality, and whether the final result justifies the investment.

What Comes in the Kit

The SKXMod Ana-Digi Tuna Modification Kit arrives well packed, with components organized in small boxes. The kit includes a thick titanium case that feels substantial, a black shroud with hex screws on the sides, a dive bezel with insert, a chapter ring, a movement holder, O-rings, a gasket, a spacer, and a crystal locking ring. A crystal press tool is also included, which simplifies installing the crystal without needing a conventional press.

The kit also comes with a set of basic tools: screwdrivers, tweezers, a spring bar tool, a microfiber cloth, and a small leather work pad. A spare gasket and spacer are included as extras, which is a thoughtful touch. The included tools are decent quality, though the screwdrivers have some bearing play and the hex tool provided has a loose fit with the shroud screws.

The Assembly Process

The assembly process is involved and requires patience. The instructions assume a level of watchmaking knowledge that a complete beginner may not have. Steps like removing and reinstalling hands are not fully detailed, and the manual seems written by a watchmaker for a watchmaker. Having some prior experience with watch assembly is helpful.

One notable issue during assembly was the absence of the double-sided tape that the instructions call for when attaching the hour marker. The tape was not included in the kit, which is a significant oversight. Fortunately, a suitable equivalent was available, but this is a real quality control problem that could stall the build for someone without a substitute on hand.

The crystal press tool included in the kit is a highlight. It makes seating the crystal straightforward and applies even pressure, which is much more forgiving than a traditional crystal pusher. The case opens via hex screws on the shroud, and the bezel is held in place by the shroud, which is a clean design.

Build Quality and Design

The titanium case feels premium and has a luxurious weight to it. The machined aluminum spacer and the crystal locking ring are nicely finished. The unidirectional dive bezel operates with a satisfying click and uses a spring clicker that engages with a sawtooth pattern on the back of the bezel, preventing counterclockwise rotation.

The replacement hands and chapter ring feature real lume, which is a major improvement over the stock watch’s unmarked hour markers. The lume is visible on the hands, the chapter ring, and even the bezel insert, making the watch genuinely legible in the dark.

The shroud screws are a weak point. They feel soft and the hex pattern is shallow, which makes them prone to stripping. The included hex tool has noticeable play, and swapping to a better-fitting bit was necessary to avoid damaging the screws. Spare screws are included, which helps, but the machining tolerance is not impressive.

Final Impressions and Value

The completed watch is striking and unique. It has a strong presence on the wrist and feels like a high-quality piece. The analog-digital display retains all the functionality of the original G-Shock, including solar charging, Bluetooth connectivity, and the full suite of modes. The lume is excellent, and the overall aesthetic is bold and distinctive.

However, the kit is not inexpensive. When combined with the base watch, the total cost approaches $450. That is a significant amount for a modified G-Shock, and it is worth considering whether the result justifies the price. The missing double-sided tape and the soft screws are genuine frustrations, and the instructions could be clearer for less experienced builders.

For G-Shock enthusiasts who enjoy the process of building and want a one-of-a-kind piece, this kit delivers a rewarding project with a striking end result. For those looking for a simple upgrade, the effort and cost may be harder to justify.

Conclusion

The SKXMod Ana-Digi Tuna Modification Kit is a well-conceived conversion package that produces a genuinely cool and unique watch. The titanium case, dive bezel, and lume upgrades transform a standard G-Shock into something special. The assembly process is engaging but demanding, and the missing tape and soft screws are real drawbacks. If you love the final look and enjoy hands-on projects, this kit is worth considering. If you prefer a straightforward purchase, the price and effort may give you pause.