Triggered Right Click Down ONLY - BTT NOT seeing right_click_down == 1

I'm trying to implement a right click & hold while I drag on a trackpad. This mouse movement is used extensively in Reaper, an audio editing application and the native way to perform right click and drag on a trackpad is unworkable.

I can, for example, set a 3-finger double tap to trigger a Custom Mouse Click - Triggering a MOUSE DOWN ONLY event.

This is good because I can lift my finger, reset and continue dragging. I can terminate the Right Click Hold with another 3-finger double tap. However, I'd like to terminate the hold (i.e. do a right mouse click up only event) with a single tap?

I would set BTT up to send a Right Click UP ONLY event conditional on right_click_down == 1. However, unless it's a native or hardware actual right click, the conditions are always false.

Is there's not a fix or a way around this, can I set a variable with the mouse down event trigger (myRightMouseDown == true), then with a 1-finger touch start use that variable with the advanced conditions - if true then do right click up.