RSI have now allowed all backers to test drive the new mustang variants, FOR FREE! Unfortunately this is only a limited time offer for January 16th 2015 - January 23rd 2015. So this is a short offer but great to try a mustang out before buying one if you want to. Note: The Mustang Delta (combat model) and Omega (racer) are not currently available in the pledge store. The Alpha (base model), Beta (distance traveller) and Gamma (racer oriented model) are all still available Source: https://robertsspaceindustries.com/comm-link/transmission/14432-Test-Drive-The-Mustang-Lineup