I ride in a Wintec Pro Dressage saddle and absolutely love it. For years I've been waiting for Wintec to come out with a Wintec Wide Dressage saddle and... they haven't.
Things are coming to a head this next year, as my back-like-a-table-top Andalusian/Arabian cross filly turns four. I started her bareback for her dozen or so low-stress rides as a three year old, but the poor filly needs a saddle eventually.
So over the last few days, I took matters into my own hands and did That Thing You Aren't Supposed To Do: I installed a Wintec ultra-wide gullet plate-- the one clearly marked "ONLY FOR USE IN WINTEC WIDE & WINTEC HAFLINGER"-- in my old Wintec Pro Dressage. And I love it... although it still won't fit my impossible-to-fit filly. It sure as heck fits the heretofore-impossible-to-fit ex-broodmare, though!
I took about a bazillion pictures and documented the process of Doing Stuff You Aren't Supposed To Do in a blog post here, if anyone's interested.