Yeah you're right. You can use the shoulder Buttons as Shift ctrl alt etc. even in WoW this counts as a command so it's possible.

You can use R3 and L3 (the analog stick buttons) that would give you another 2* Modifier and Start+ Select 2*Modifier if you use just Shift ctrl alt this makes 2*3 +
2 without Binding :

R3L3(2*3+2)
Start Select (2*3+2) = 8+8 =16 With 4 Buttons and 3 Single Modifiers. If you would stack the Modifiers like ctrl+alt shift+ctrl shift+alt makes 3+ per Button that equals another 12

= 28 with only 4 Buttons

Learn all of it to play blind xD and you're insane (I mean with all of the 4 Buttons + 1 Shoulder [Just 3 Modifier] makes 7*5 =35) 6 different Modifiers + 1 without

Makes 63 Combinations (without Digipad) You can also Bind the Axis of your Analog sticks to Buttons that would eventually make another 4*7*2 =56?! + Digipad 28

Makes a total of 84 + 63 =147 If I haven't done something wrong xD

That's what I call lot of Buttons on 10*10 cm ^^ Who needs a X-Keys Pad? xD Ok not so easy to control, But for me that'S really cool, I like thos combinations.

You do not really need so much buttons, the more Buttons the more possibilities are open, but these are some kind of extra thing.

I'm going to keep Upß with it, it's kinda Exciting^^