are these seats too high

[novalew]

It's been years since I had a nova. I have fitted some astra seats today. While the seating position feels ok it also feels high. Does this look high or am I just used to my astra. Also on the bottom two pictures aren't there supposed to be clips? http://i1107.photobucket.com/albums/h381/novalew/20130420_133855_zps70c6f325.jpg
http://i1107.photobucket.com/albums/h381/novalew/20130420_133907_zps44d2f871.jpg
http://i1107.photobucket.com/albums/h381/novalew/20130420_101625_zpsd0d8a930.jpg
http://i1107.photobucket.com/albums/h381/novalew/20130420_101619_zpsb749d441.jpg

[Simon 1867]

They look the right height to me

[Plug]

there should be a plastic insert in the end of the runner.

stops the seat base from rattling around

[novalew]

Cheers both. Just because I I haven't been sat in one for so long lol.

Anyone got the plastic inserts?