Tune up your model with Slot.it parts and motor mounts! This chassis (code S09-ST3) is designed to fit under any Scalextric McLaren MP12-4C GT3 body (for example C3253), and is fully compatible with Slot.it parts and motor mounts. It is also compatible with Scalextric SSD EasyFit Digital Plug C8515 whose latch may be closed with DPR Chip cover S99-S01. Cockpit must be replaced with Slot.it Lexan part (S09-XA1) or the replacement cockpit available on Shapeways (McLaren MP12-4C GT3 cockpit S09-SA1). This version of the chassis comes with the 'LMP type' pickup holder. Due to the nature of 3D printing, some adjustment may be necessary. Read the Shapeways Scalextric FAQ for a suggested list of parts to be used with Scalextric models. This product is not a toy and it's only suitable for model makers of at least 14 years of age.