Never used one so really don't know anything about them.....I can tell you what I do....On a actual gun the outer sights are closer to your eye and the middle sight is further away....the the middle sight needs to be centered between the outer sights (for straight shooting).....on my guizmo that is not the case (they are all three the same distance from eye) so won't work quite the same as a actual gun.....This is a method I have adapted which I think fits your method of triangulation.....and plays well with the gun (like) sights on my guizmo....
Every pool player I have watched good and bad....seem to stand behind the ball with the cue at an angle across the track line and then seem to pivot the cue into alignment with the "back" of the CB as they are getting down on the shot.... .....When they get down on the shot the tip may be at the correct point on the CB but the back end of the cue may fall "off line" ending up with a crooked cue and a stroke that has to basically swoop into the line.....I have seen video of myself setting up crooked....
What I started doing is using the CB as a center axis to make sure my cue was dropping down straight....You may not tell I am doing it when shooting as it happens very quick in the pre-shot....but as I am standing up...my cue pivots square to the alignment line through the CB through the GB to a point on the OB before I drop down on the shot....as I drop down on the shot the cue is already aligned to the OB but drops in behind the CB...........I am basically using all three of those points (still standing up) to drop my cue on......I use a variation of stick aiming so some shots use the center arrow (center shaft) some use the left or right edge.....So...since I am using three points....I guess you could say I am "triangulating" the cue before I drop down on the shot...
Here is a crude diagram but the straight lines represent the cue and what I look at while standing and what I set my cue up to before dropping down on the shot....The arrows on my guizmo help make the view very precise....and I can develop the relationship of center cue and edge of cue.......hopefully that all makes sense on how I apply the triangle gun sights....
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