I don't have any direct experience with the TF sliders. Mine are from Rovertym, well that's the name when I bought them. They are RTE now. Anyways, they look similar to the TF version as they are sill mounted. If you come down pretty hard on them, there's a good chance the sill will start to flex. Possibly to the point where the door bottom rubs and won't fully open. Just carry a BFH to bash them back down.
I don't know what the specs are for TF, but you want steel that is 3/16" thick. Looks like it should use the existing holes when you remove the plastic rocker piece. The D2 has a slightly angled rocker near the rear door. The TF sliders look straight so there might be a small gap, but hopefully they took that into account for the design and fit well.
When I had the 33s put on there was some good rubbing on the front of the slider when turning. I chopped about an inch off the slider and had a cap welded on the end and its been fine ever since.