Anyone else having problems with Masta fly rug?

[blackmagic]

As the title really. I bought the Masta zing a few days ago and every time I've gone to check on my horse the surcingles have come undone. My friend has one and has the same problem.
Anyone else havig problems? SHould I take it back?

 

[gails]

Mine does the same, I got some rubber stoppers, that seems to have solved the problem

 

[brightmount]

Or you can just put elastic bands on the T bit.

 

[4leggedfurries]

Mine came with the rubber stoppers, and i've never had a problem. Only prob with it is that its a little tight around the shoulders and gives him some lovely rug rubs