I started with Petrus as beginner method finishing f2l on the left.
2x2x2, 2x2x3, eo, f2l -1, f2l, cp, Co, epll
After some time I changed my last layer steps and learned full pll
2x2x2, 2x2x3, eo, f2l -1, f2l,Co, pll
Then I moved edge orientation to ll phase
2x2x2, 2x2x3, f2l -1, f2l, 2step oll, pll
Then I ditched block building
2x2x2, finish cross on the left, then cfop
Then I moved my cross the bottom
Then I started doing cross before first block completing full transition from Petrus to cfop.