milosp @BigHomieYoda the large was tested with + diopter but - should have about the same protrusion, only it would be thicker on edges instead of in the center. The -8 would not fit on that adapter, but if you order the lenses first and then measure the protrusion when they arrive, I can upload the custom adapter here (the same as what the guy with +5.25 did, and I left it as printable model here)