Our products are custom-made to fit your instrument. After your purchase, we will send you an order form, so please fill it out. Thank you very much. With the release of Ver7.0, we will discontinue the sale of Ver6 (the type that extends towards the 1st string side). The low-action 1st string typically uses a side-swipe thumb technique, and to provide space for the rotary and starting point, we ultimately concluded that this design was the best without an extended structure. We are pursuing a natural landing feel with a "fully curved surface" and the use of finger hooks with "moderate cornering and rounding." We aim to provide natural support to the extent that you can still play even when switching to a bass without the product attached. Regarding Ver5 (the type with a slit on the 1st string side), we will continue to offer it as there are a certain number of customers who want it. ＜Important Notes＞ ・The shape is now even more seamless and smooth. ・You can now specify the depth length! (Please note that excessive length may reduce the slope.) ・Designs for wrench insertion points, etc., are also possible (not recommended for hex wrench insertion types). ＜About Various Specifications＞ ・Straight ends and length specifications are included in the basic options. ・If you change the width to 5-string, the straight-end model will be 2080 yen, and the curved-end model will be 2480 yen. ・If you want to add a wheel guard or truss rod access to the neck end, it will be the 2480 yen class. However, the upper limit is 2480 yen even for 5-string models. ＜Notes＞ ・The neck-end shape varies slightly depending on the manufacturer, but it is generally the same for 4-string JB basses. ・However, the height and fingerboard curve values vary among manufacturers. (The neck-end part often does not match the specification values.) ・We will measure the actual product and individually manufacture and deliver the product with the appropriate thickness and curve values. We also offer custom-made finger ramps with various shapes and designs that follow string height. Set discounts apply for combined shipping. We offer designs tailored to your playing style, so please feel free to contact us (^^)