I have a Linhof Super Technicka IV and recently purchased a frensel +acrylic screen to brighten the GG....it didn't come with instructions.

Can anyone give me instructions for installation?

Do I REPLACE the existing ground glass?

I saw in another thread that I am supposed to put the fresnel (frosted side towards lens) in first, then the acrylic....but do I completely remove the ground glass (and safeguard for later)?

Thanks in advance for the assistance.