At Loops and Legs 2016 the Forcer program, which can efficiently compute 4-loop massless propagator diagrams, was introduced. First, I will briefly discuss some new results for 4-loop splitting functions. After that, I will show some techniques to 'extend' Forcer to 5 loops. One of those techniques is R*, which can be used to calculate the pole parts of 5-loop diagrams (for example to compute anomalous dimensions) by rewriting the problem into a 4-loop one, suitable for Forcer. The main focus of this talk will be to explain how the R* operation works for QCD. I will finish by showing some recent 5-loop results.
