Underplates for securing old BOSS twin pedal effects (RE-20 / RC-30 / DD-20 / OD-20 / RT-20, etc.) to an effects board with Velcro. This product is produced in small quantities and manufactured using a 3D printer. Due to the nature of 3D printing, - Fine, thread-like residue - Slightly imperfect hole formation - Slight distortions in circular shapes may be present. While these imperfections do not affect functionality or installation, please refrain from purchasing if you prioritize a flawless appearance. Installation Instructions Fit the underplate into the recess in the center of the anti-slip rubber on the bottom of the effect pedal and secure it using the three screws on the unit. (No special modifications or alterations are required.) Compatible Models Measurements and verification were performed using the RC-30. It is believed that the underplate can be installed on models with a common structure to the old BOSS twin pedals, but compatibility with all models has not been confirmed. Therefore, we are unable to answer questions regarding the suitability of individual models. Please understand this beforehand. Shipping As the product is manufactured and prepared after the order is placed, it may take some time to ship. *Please refrain from price negotiations.