I use the newest version from Forge / RFTools / RFTools Dim (30.08.2017)

I think you see the problem (the text over my inventory :) ) . I have the GUI on "Large" in the options , the picture is in "normal" ,because the resolution.
I have a Elevator button installed.

Having the same issue, and it persists at all GUI scale levels from "Small" to "Auto". I have Optifine installed, though; maybe it's somehow related, although I'm pretty sure it doesn't change anything in GUI rendering.

Thank you for taking the time to create this issue, as we're no longer supporting versions below 1.12, I'm going to go ahead and close it but if this bug seems to continue over to newer versions, please do report it again so we can investigate the issue further.