Using capslock key to trigger a drag mode

I try to use BetterTouchTool to program a behaviour on my MacBook Pro.
Behaviour:
When capslock is turn to on -> track pad is on “drag mode” with one finger (like holding a mouse left click down)
When capslock is off -> track pad behaves normally (like if mouse left click down was released)

Does anyone know how to set this behaviour ?

I’m struggling in setting this up. Thanks for your help.

Here is a preset that would allow for this, however the default capslock functionality will not work anymore then:

capslock_drag.bttpreset (4.2 KB)

The preset remaps capslock to do nothing, then uses key sequences to start/stop mouse drags:

Having a toggle-able version of this would also be easy, do you still need it?

Yes please. Thanks for your kind help.

this one toggles start/stop drag on short press and when long pressing caps lock does the default caps lock:
capslock_drag_toggle.bttpreset (9.0 KB)

Thank you Andrea. I made this preset DragLockBTT.bttpreset (11.2 KB) with both solution you provided. It’s not exactly as what you offered in your presets. But it works for me. What do you think?