# The R7Makers Ledger | Modular Book Tracker & Mechanical Counter

### **The "How & Why" Behind the Design**
I’ll be honest: I initially tried to print this as one solid piece, but the print time was way too long and a single failure was costing me an entire spool. I went back to the drawing board to create a modular, "smart" assembly that actually makes sense for a workshop environment.

The **R7Makers Ledger** is a tactile, mechanical tracking system. I designed this specific version for the "BookTok" and reading community to track yearly goals (0-999).

### **Maker-Centric Features:**
* **Texture Optimized:** This model is engineered to be printed **face-down**. By using a textured PEI plate, you get a professional finish that hides print lines and makes it look like a retail product.
* **Modular Reliability:** By breaking the cover, pages, and spine into separate parts, you minimize risk. If one part fails, you aren't starting from scratch.
* **Zero-Hardware Hinge:** No need to source tiny metal pins. The hinge is designed to use a simple strand of 1.75mm PLA or PETG filament. 

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### **Production & Assembly Tips:**
* **Magnets:** Designed for **9mm x 3mm circular magnets** (4 total). They are a snug press-fit, but a tiny dab of superglue ensures they never budge. 
    * *Pro-Tip:* To get the polarity right, press the magnets into the "pages" first. Then, let the next two magnets snap onto those. Press the lid down onto them to ensure a perfect "click" closure.
* **The Hinge:** Thread your filament through the spine. I like to take a soldering iron and lightly "mushroom" the ends of the filament for a permanent, clean finish.
* **Tight Tolerances:** The pages are designed to be a very tight fit into the back cover. This ensures the book feels solid in the hand. A little pressure (and a drop of glue for longevity) goes a long way.
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### **For the Shop Owners & Content Seekers**
I’m sharing this design because I want to see more functional, high-quality prints out in the world. Whether you are running a business or just love a new project every month, the **R7Makers Merchant Tier on Thangs** is designed to be your partner.

👉 **Part of The R7Makers Ledger Collection:**

* [**The R7Makers Ledger V2 | Tickets Closed | R7Makers**](https://than.gs/m/1509881)  
* [**The R7Makers Ledger V2 | Practice Completed | R7Makers**](https://than.gs/m/1509880)  
* [**The R7Makers Ledger V2 | Projects Completed | R7Makers**](https://than.gs/m/1509879)  
* [**The R7Makers Ledger V2 | Debt Paid | R7Makers**](https://than.gs/m/1509878)  
* [**The R7Makers Ledger V2 | Chores Complete | R7Makers**](https://than.gs/m/1509877)  
* [**The R7Makers Ledger V2 | Books Read | R7Makers**](https://than.gs/m/1509876)  
* [**The R7Makers Ledger | Modular Book Tracker & Mechanical Counter | R7Makers**](https://than.gs/m/1509221)

**Why join the Merchant Journey?**
* **Monthly Chapter Drops:** This Ledger is the cornerstone of **Chapter 3 (Mechanical Counters)**. Subscribers get every variation I release (Savings Trackers, Fitness Goals, etc.) delivered automatically as part of the monthly content pass.
* **The Master Production Plate:** I’ve included a "Master 3MF" specifically for subscribers. It pre-arranges the 30 number tiles and the spine for a one-click, efficient print session—saving you time and setup.

* **Full Commercial License:** Gain the legal right to sell physical prints of the Ledger and all other R7Makers designs, while subscribed.
* **50% Storewide Discount:** Need a specific file from the archives? Active subscribers get half-off every individual item in the shop.

I’m here to help you grow your collection or your business. If you have questions about printer settings or assembly, reach out.
**[👉 Join the R7Makers Merchant Tier on Thangs](https://thangs.com/designer/r7Makers/memberships)**
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### **Technical Specs:**
* **Print Orientation:** Face-down for all covers and tiles.
* **Supports:** None required.
* **Hardware:** 4x (9mm x 3mm) Magnets + 1.75mm Filament strand.
* **Material:** Works great in PLA, PETG, or even Wood-fill for a "classic book" feel.


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The R7Makers Ledger | Modular Book Tracker & Mechanical Counter | R7Makers