Great news for you! I finished the 6 Drawer Chest and this Thread will die a quick death! Fortunately it was done before my wife got the drawer pulls and knobs. Before posting 2 photo's a couple of things I took away from this project.
Do not try to repurpose drawers. Having to conform to their original build dimensions, drawer slides species of wood fronts to match and the non-wood drawers, don't do it. Build your own, the time saved is well worth the money spent. I built one drawer, the bottom one on the chest. If they were all the same exact species like that one which is the same as the face frame, sides and top, it would have looked much better.
Glue ups, it was likely me giving wiggle room for glue to get good in the slots but using splines were not helpful in lining boards up.... time wasted.
Pocket holes deviate a little bit. It's very noticeable when the board is thin (9/16) and you are trying to get as much of it screwed into it as reasonably possible. Whether there is a slight angle difference in drilling (doubtful but possible) or in screwing (very possible) that deviation can and will show a point of a screw. That leads to one more fix this episode. I tested a bunch before drilling the pocket holes and used only one of the slots in the Kreg Jig in hopes to avoid any oops. I also tried to be very deliberate in the angle of the screw in the pocket hole when attaching the face frame and the sides to the face frame. Even with the added precaution 2 screws wanted to be seen and were dealt with.
Have a more precise plan. Changing dimensions and joints and looks etc., etc. wastes time and tests patience.
Finishing. When spraying you need adequate space to turn around. In this case I should have done the chest separate
from the drawers.