Yamaha DTXpress/DTXplorer/DTXtreme

Hi,

I just got my dtxpress 3.. its a nice unit and all.  I do notice the 
following problems:

Rack clamps seem a bit light.. not stable as i'd like them to be, do 
they sell better ones?  not that i want to sink more money into 
these, i wonder if Gibraltar clamps would work.

I really have to mash down hard on the hihat pedal even with the 
shortest stroke.  is this normal?

crosstalk - hihat is triggering when I hit the snare sometimes.

I dunno, I was hoping for better quality in some things..  I wont 
say im disappointed yet, too new to the e-drum thing.

What do you all think?  Any suggestions, recommendations?