alstack
2 strokes are in general easy to operate, i really like to train beginers with .60 trainers like the one you have, and once you are ready for the next level, it will help you to use your thrusty engine from the trainer, it will be well broken-in and you will understand it 100 %, my sugestion is to keep it until you feel comfortable with the contender and then if you want explore the 4-s territory change to it.