this difference won’t damage your record. your stylus will be tracking under the different angle. that might or might not be beneficial. there are solutions such as cartridge spacers, but they add weight and need to be re-adjusted properly after applying. Also you can use extra washers for providing ideal tracking angle. Mainly you’ll want your arm tube parallel to record surface.
New turntable SRA questions
Hello I am very new to vinyl. I bought a Technics SL-D2 that was in good shape but the mat was hard and oily. I bought a Hudson HI-FI rubber mat to replace it. At the time, I didn't know about VTA/SRA. I measured the old mat at 4.2mm and the new one at 2.6mm. This TT does not have a VTA adjustment. Will that difference damage my records or will it just sound worse? Or is it ok? My records still sound great and everything looks OK to my eye. Any advice would be greatly appreciated.
My TT setup: Technics SL-D2 with Audio-Technica VM95e headshell and cartridge.