※ This jig was used to build an FMXX chassis that won the Mini 4WD Japan Cup 2025 Niigata Tournament Open Class. This is a jig set for constructing modern front and rear bumpers on SX and SXX chassis. It can be used for both forward and reverse rotation. This jig set allows for the following modifications: ・ Slicing the bottom of the front bumper ・ Creating new hole positions for the front bumper ・ Cutting the front bumper ・ Creating a rear 3-point plate A QR code for an instruction manual detailing the bumper cutting procedure is included. The instructions are also available on our X account. ※ Tools and parts shown in the product photos are not included. ※ Due to being a 3D printed product, there may be minor scratches or layer lines from the finishing process.