Planning to make a GGL redemption shortly. I want to use an AMEX 2-4-1, 2 x GUF1 and 1 x GUF2 to book CW tickets. Please can someone kindly remind me what booking class I need. I believe its D for a straight booking into CW (which I'm not sure will be available at T-355) but did I read that it works differently if you use a GUF? Many thanks.