you have two way, first is push brake give +8 boost and take stick full pull, then you will up from 3 points, second - you can give some power step by step, and help not only with rudder but with different brakes, and up from 2 points, after landing you must to press brakes after all 3 legs on the ground, till spitfire lost enough speed, and this is only about current model, guys who made it try to improve it with any patch, so… any way, after landing and lost enough speed, and before get some speed for take off you must make tail maximum heavy(pull the joy to the limit)
take care