I've been trying but I always fall back to the same problem which is attaching the gantries (that hold the clamp) to the underside of the walkway up the top. The weight of the TIE Fighter is just to great for two measly supports to hold.
I'm obviously trying to replicate the movies as much as possible, and don't want too many supports or gantries in the way to obscure the view of the Fighter which is what everyone will want to see.
I have come up with an idea of resting the Fighter on two supports rather than clamps (excuse the colours and poor choice of supports, it was a rush job):
It holds up quite well but after a while the supports give way to the base plate up the top. As you can probably tell I'm perhaps not the best bricker around, I much prefer to collect. But this has me irritated and interested all at the same time!