With 2WD racing buggies, there are three basic types of car.. 1/ A traditional rear motor buggy designed for use on dirt/clay - the oldest style and all makes have had them but not much use on modern high grip surfaces such as carpet or astro turf. Examples are Associated B5, Losi 22 (can be converted to Mid) and a few others out there. Hardly anyone runs a rear motor in the UK and even in the US they are giving way to mid motors. 2/ Mid motor. Despite the name the motors are not in the middle but just in front of the rear axle and offer better front end grip than rear motors but still good traction on lower grip. Examples are Losi 22, Associated B5M, Team C TC2C, Kyosho RB6, XFactory X6 cubed 3/ Front motor or "cheater" cars. These started as modified 4WD buggies with the front transmission disconnected to give maximum front end grip and balance for the highest corner speed and agility but are not as good on low grip although this is being engineered out so they can run on lower grip OK. The Schumacher KF series is a purpose-built front motor now in two versions and have been joined by Team C TM2 and XFactory X6-S. The Yokomo YZ2 sort of fits in this category as well. The SV2 is the last mid motor built by Schumacher and is a top racing buggy but from the last generation. You will be fine while you relearn your skills but when you get better and want to maximise your results a front motor is probably the way to go but it can be very track dependent. My track is a carpet and the B5M competes pretty well but it is nearly always won my a front motor. One last point is that the B5M can be converted to what they call a "lay down motor" which moves the motor forward a little as a part way to a forward motor. The Yokomo does this out of the box and is a great car on carpet. I would say get the B5M, it is a great learner car and can go quick with some mods after all it did just win the world championships. Parts are cheap and plentiful from most racing shops