Hi to everybody.
Thank you for yous answers. Right now, I've got 23 membranes reserved in all the threads I've published on the net. Let's see if we arrive to 50 or more.
cklayman: I'm doing it through this website: http://www.rwapsoftware.co.uk
They've got experience with membranes. In fact, they sell brand new membranes for all Spectrum computers. They are serious and reliable.