I love this dress and would love to order it in champagne. I'm not getting married until May and hope to lose some weight. Is there any chance I could pay for it in full while it's on sale and then wait until Feb or so to get it made up? Also, I'm pretty big, between a 16 and a 16W and I'm just a little concerned about my upper arms as the style of the upper sleeves looks quite tight in the picture. Is there any give or are the proportions 'more generous' in the larger sizes? If not, I'm happy to pay extra to go for custom measurements, if that can be taken into account. Thanks.