In my experience, the Skylan stands made the SHL5s sound dull. I tried putting some hard interfaces on the stands, casino chips as I recall, which improved the sound, but I eventually went to an Epos open-frame metal stand, which was far better. So IMO, the SHL5s are quite stand-sensitive and you have to work with them. I don’t know if the Epos stands are still around. Here you go -
https://www.hifi4sale.net/t30619-epos-11-speaker-stand-used
https://www.hifi4sale.net/t30619-epos-11-speaker-stand-used