My biggest achievement to date by far was making my daughters wedding dress

 Emma has the underskirt on which has two layers a fine cotton with habutai silk on top.  The dress is silk double crepe with a lace top and trim and has an acetate lining.

This is me trying to fit the fiddly bow on the back

I also made her sisters dress which was very last minute because we had looked all over for a dress but were unable to find one in the style that Emma had in her mind.