Squats

Question: If I can do 1-leg squats, should I dump the Bulgarian Split Squats and concentrate on the 1-leg squats?
 * The advantage of the Bulgarian Split Squat is that it's a much easier exercise to add weight to. Incorporating weighted BBSs into your routine is a great way to keep increasing the resistance without the balance issues of weighted pistol squats, and the knee is in a much safer position to carry a heavier load. Either loading a backpack with makeshift weight or using dumbbells are excellent options for doing weighted BSSs.

Question: How to get to 1-leg squats?
 * BSS and regular squats, along with some side squats seemed to get me to 1-legs. Next is to get my non-working leg up out of the way. On days I'm not doing squats I do leg raises to try to train it. Pistols someday!