My Q200e has spikes fitted which in turn sit on four seperate 20p coins. I have a wooden floor and this stops it getting damaged. (I am thinking of upgrading to four 50p coins but i just know at some point I shall then want to use £1 coins and then eventually move onto £2 coins.......upgraditis

)
Don't know about the plastic screws but i wouldn't say they are the best thing, I would have thought rubber would have been better

Still, as long as they can be adjusted to stop the thing rocking about thats the main thing.
__________________