Key strokes for power trays

I've been playing CoH for almost a month now and have a question about the accessing the different power trays through keystrokes. As my toons level and get more powers, I've needed to use the 2nd power tray. Are these trays accessible by keystroke? I have a Logitech G15 keyboard and would like to assign some of my most used powers to the function keys, but Shift+ the number or Cntrl Shift + doesn't seem to work. Seems very inconvenient to have 9 power trays available and your only option is to spread them around your UI and mouseclick.

As far as I know, CoH doesn't let you combine more than one Chord key, and it doesn't let you combine non-standard chords. (You can't use /bind g+h command.)
The only possible combination for any particular key is:
KEY
alt+KEY
shift+KEY
control+KEY
fn+KEY (not available for everybody, and doesn't always work as you intend, depending on the standard alternate function of the KEY being used)
(Lalt, Lcontrol, Lshift, Ralt, Rcontrol, Rshift are just the names of the individual keys, and be bound alone. Trying to use them as Lalt+KEY chords doesn't always work the way you intend.)

The only other Chord CoH allows is MOUSECHORD to represent the press of both mouse buttons at the same time.

--------------------

But anyway, you can bind any power to any keystroke you want in a variety of ways...

By tray position...
First tray: (not necessarily Tray#1, but the tray currently showing in the first row)
/bind KEY powexec_slot #
Second tray: (not necessarily Tray#2, but the tray currently showing in the second row)
/bind KEY powexec_alt_slot #
Third tray: (not necessarily Tray#3, but the tray currently showing in the third row)
/bind KEY powexec_alt2_slot #

For any of the extra trays, you can also all a power by it's position in your tray array:
/bind KEY powexec_tray # #
The first # being the tray position, and the second number being the actual number of the tray.
So if you wanted to use the power that's in the 6th tray, in the 2nd position, you could bind it using:
/bind KEY "powexec_tray 2 6"

Or even just by name:
/bind KEY powexex_name "Heal Other"

So if you wanted to, you could set up binds to set your numpad# to do your 4th tray, and alt+numpad# for tray5 or whatever your preference is. Or you can just bind your favorite or most used powers to specific keys of your choice, either by their tray/slot position, or just by their name.

Also:
There are binds that let you easily flip your trays to the next or previous tray so that you can still use the default 1-9 for every tray depending on which one is currently showing.

You can change these by sequence:
/bind KEY next_tray
/bind KEY next_tray_alt
/bind KEY next_tray_alt2
/bind KEY prev_tray
/bind KEY prev_tray_alt
/bind KEY prev_tray_alt2
(I believe the default for the first tray is the - and + key for prev and next)

Or you can change the current tray number directly:
/bind KEY goto_tray #

Quick Example: (assuming you keep the default 1-9 for powers in the first row)
/bind alt+1 "goto_tray 1"
/bind alt+2 "goto_tray 2"
/bind alt+3 "goto_tray 3"
/bind alt+4 "goto_tray 4"
/bind alt+5 "goto_tray 5"
/bind alt+6 "goto_tray 6"
/bind alt+7 "goto_tray 7"
/bind alt+8 "goto_tray 8"
/bind alt+9 "goto_tray 9"
Then, you can use shift+# to pick the tray you want to use, then press the # of the power you want in that tray.
It looks a bit clunky at first, and may seem like more work, but you get the idea. You can use this concept to do it however you prefer to program your powers. As you can see, you have plenty of options!

You have some programmable keys on the G15, you could set up those keys to activate powers for you. Some resources to read: Guide to Binds and List of Slash Commands

You could set G1 to /pow_exec_tray 1 9 and that would activate the first power in tray 9.
Set G2 to /pow_exec_tray 2 9 would activate the second power in tray 9. Etc.

Put the powers you want in tray 9, put it as a separate tray out of the way somewhere on your screen and put the powers you want there. This is a flexible system you could use for all your characters.

This is more than you actually asked about but it lets you make use of those lovely programmable keys on your G15.