The color is easy to change, I chose that one because its the same saturation and intensity as the red used in the TF2 interface... I've even thought about purple as its halfway between blu and red, but that might get confused for one of the two... Changing the yellow color is just a matter of swinging the hue slider in photoshop for the model texture and the hud Icon..
Update on my MB... they were supposed to send me an email to fill out and fax to them so they could start shipping my new one.... no such email

and their RMA department is closed...