Modifying boots into split cut boots

I've got boots that are 1 piece which are a pain to pose a figure with as it limites their dynamic poses.

I'm looking for advice or tutorials on how to cut or if someone has attempted this and found that it does not work.

Here are images of the 1 piece boots for the vts hunter and then the split cut boots for the damtoys Exio for comparison

I'm assuming you want to divide the boots at the ankle so that you can have ankle articulation. I can't remember where, but I did cut one-piece boots into two-piece boots once or twice, a long time ago. Basically, identify the line where you would cut without making it too obvious (it has to be both sensible for what you need and reasonably concealable), heat them up to soften the plastic with a hair dryer (or hot water), and carefully cut with a sharp X-acto knife (or similar). Depending on what you are cutting around, you might have to keep deeper and at an angle under certain elements (like armor plates or whatever). In the end you should end up with each boot as two pieces: the top one essentially acting like a greave through which you slide the lower leg, the bottom one encasing the foot.