First of all I never use the game's tries during the championship. If I finish on 4th, it's game over for me and I restart the championship from the beginning. The tournament in the picture, was done with 44 pts in one go with 3rd place in last race (can also achieve 46 in one go). I didn't want to cross the finish line despite being on 3rd just so I can practice a little more the last race. My second attempt resulted in 1st place. This is not the first time I end up on 1st place in the last race, but I have done that in championships with 46, 44 pts. Oh and can't wear the headphones for more than 6 minutes (hurts my ears) so I use them only on 2nd,4th and 5th race. However, the race in the picture was done without headphones. Every time I begin a new Championship the starting grid stays the same with the cars that you see in the picture because I want to compete with the best.
My intention is to show that it can be done with a lot of practice. To make 50pts in one go with Phat Slug is not so impossible although I haven't managed to do that.