"Hacking" Geant4 particle track

Hello everyone!

My question is basically the following: is there a way to “hack” Geant4 into providing a longer photoelectron track that what it currently outputs, but not affecting all other physics apart from that?

Suppose I have a “ground truth” simulation for the path of a photoelectron generated by a 10 keV X-ray photoabsoprtion event inside a scintillator (from another software). It shows a ~2-3x longer track that what Geant4 shows (with low-energy physics package like Livermove and maxStep of 10 nm).

However, Geant4 is very convenient for the whole setup simulation. Can I somehow then trick the parameters of Geant4 such that only the photoelectron track is concerned? Just changing material density or Z would not work as it also will affect the probability of photoelectric absoprtion of the X-ray, and I don’t want anything to change with regards to X-ray interaction with the scintillator; only the subsequent photoelectron track.