The a4000 i have has all memory slots damaged except chip ram slot which has been replaced with a higher quality socket ive used double sided tape type stuff to stick the sims down by sticking it to the sim in the good socket then puting next sim in and repeating the process of double sided tape for all the sims .Im thinking of sticking a bit of glue from a glue gun to hold them a bit better unless my cyberstorm mark1 060 works ok in it. :-)