For finger flapping, I tied rubber bands from the top neck screw to the spatula keys, and then I was able to tie some on the lower stack too, but it was much more difficult to find a good place there.
It really helps. When your fingers come up, they hit the rubber bands. As for placement of the bands, that's dependent on your horn, and how I placed mine might not work for you.
"Having problem's with flapping fingers, any suggestions, I play the standard B flat ie top key both left and right stack, I know there is alternative fingering for B flat, would this help ?"
I've always played standard Bb as the first one Pete mentioned. I typical do Bis Bb as an alternative, and have never had any problems with using these two in any fast passage.