Great choice, I wish I had kept my TD124, it produced the best bass I ever had (with V15Vxmr beryllium cantilever tracking at 1.0gm on SME 3009) but that wonderfully machined bearing is very susceptible to vertical transmission, my floors were too springy, so think about it’s location, perhaps a wall shelf.
It's metal frame is solid, you do not need to stiffen it, you simply need to isolate it from any vibration getting to it.