With Silent Gems flight equipped, I glitch through the elevator, but only going down. The ride up is smooth and enjoyable. Not sure if it's you or him, I will post to both. You can close this without responding, just wanted to make you aware of the (potential) issue. Great mod.

thutcore 5.13.2
thuttech 6.0.10
silentlib 2.16-97
silentgems 5.11-250

Can you confirm whether this still occurs with recent versions?