Rapid 2wd amp 4wd servo robot platforms rapid 4wdserv the 4wd robot platform from rapid gives you the opportunity to build a simple robot at a bargain price its based around an anodised aluminium chassis which is pre cut for servos the chassis also has a useful set of mounting holes and slots for additional hardware such as a microcontroller or sensors these platforms are compatible with any microcontroller such as the arduino orangepip picaxe genie and others as servos dont requir