I've used Fingerworks iGesture NumPad for many years and am attempting to transition to Apple's Magic Trackpad before my last iGesture pad dies. I've got the Magic Trackpad mostly working with the help of BTT 6, but I've run into an issue. Here's the bottom line:
1. I've determined that many things (especially in MOTU's Digital Performer) work much better if I choose the MacOS pref for 3-finger dragging (with the optimization for this in BTT). But the "release time" after lifting my fingers from a drag is too long by the MacOS default. AI suggested adding the Trigger "Release Last Finger After Previous touch with 3 Fingers" and connecting this to the Action "Left Click (At Current Mouse Position)". This works great: when I lift my fingers from dragging the item is immediately released.
2. I am using 4-finger tap for right-click. Unfortunately, for reasons I don't entirely understand, the "Release Last Finger..." trigger described above interferes with this. When I tap with 4-fingers, it seems that both the right-click and a single (left) click are sent, causing undesirable results in the app. AI suggested adding an advanced condition to my "Release Last Finger..." trigger: "Condition: fingers_touching_trackpad > 3 AND left-mouse-down = 0". The idea, I presume, is that this should block the left mouse click from being sent when more than 3 fingers are detected. And it works, in the sense that it allows my 4-finger tap to right-click to behave correctly. But it also seems to prevent the left mouse click from being sent after a 3-finger drag.
So it seems I can only have one or the other: either the 3-finger drag works the way I want (but 4-finger tap to double-click is broken) or 4-finger tap to double-click works, but 3-finger drag doesn't release as quickly as i'd like.
Any suggestions?
unfortunately three finger drag alone is already very problematic, trying to additionally modify the system drag release timing will cause an endless amount of pain 
It might seem to work with your setup, but you will run into lots of subtle issues and never know where they are coming from.
You won't be able to make this work well with BTT
Thanks for responding, Andreas. Unfortunately I'm finding that Digital Performer doesn't respond well to dragging (which is crucial in editing) using anything other than the 3-finger option. But I'll continue to experiment.
In any case, BTT is super useful, thanks for creating it. There's no way I could make the transition without it. It's just frustrating that the old iGesture pad I've used for years is so much more responsive and accurate and flexibile than a modern Magic Trackpad, which is based on the multitouch technology that Fingerworks developed.
For the receiving app there should not be a visible difference between the various drag types (click to drag, double tap to drag or three finger drag). If Digital Performer is behaving differently for these, they are doing something very strange.
I have never had an iGesture pad, but they sound great! The dragging delay Apple added is quite intentional though, they have that across their platforms to allow dragging across longer distances by briefly lifting the finger(s) then continuing the drag. The unfortunate thing is that Apple doesn't offer a way to just disable the delay.
Nevertheless, I find a big difference in Digital Performer between 3-finger and other methods of dragging. So MOTU may indeed be doing something strange; I'll bring this question to them.
The iGesture pad has served me well for many years. And in fact the drag delay that Apple added is really unnecessary, because instead of briefly lifting the finger you can continue to drag by keeping any finger in contact with the pad. You simply have to learn a "crossover" gesture, similar to how pianists do a "thumb pass" when playing scales, to drag indefinitely. Fingerworks made this design choice explicitly for the iGesture pad and it still works on the Magic Trackpad, but I would guess that Apple concluded it was either non-intuitive or too difficult for the average person to learn and opted for the drag release delay. I agree that it would be great to be able to disable it; that would solve the issue I posted about above.
Apple also needs to find a way to disable(?) their laptop trackpads during typing (with tap to click selected)--but that's a separate issue.
