The Prestige Lucky I have on trial doesn't fit. It doesn't fit so badly that I could see daylight through the bridging areas but, we think it's just because it's too narrow. So, I'm going to take a leap of faith and try to get another trial in a wider tree size. If it fits it will be perfect, if it doesn't, I'm going to wish that I hadn't gone for either trial but at least I'll know!
I LOVE the saddle though. It's the new Lucky Idol and it's gorgeous, the leather is amazing, I love the flap length and the seat is really comfortable for me. I'm going to have my fingers crossed until I get a chance to try it.
In the meantime at the suggestion of my trainer I picked up an Amerigo Vega from our local tack shop. I heard great things about them for ponies. This was a wide 17.5" so it was a bit of a wild card and while the shape of the tree fit really well and the point billets put the girth in the right place it was just too wide so it still slid forward (worse than my saddle actually). It's on my list since I think if I can find a 17" in a MW or M tree it has a good chance of fitting. It wasn't my favorite to sit in though so It's not at the top of my list right now. Once I've had a chance to try a different tree size in the Prestige Lucky I'm going to try a few other options.