Harukk use a different method for obtaining the Ballistic Knife then. You can use a box patch for example: https://github.com/B2ORG/T6-B2OP-PATCH#overriding-box-weapon
For faster pick up after an explosion using the PhD Flopper, try pressing the jump key (usually the "space bar" on your keyboard) immediately after the explosion so the character recovers faster and doesn't crouch.