No need to change the T-plate, the 'ball diff' box fits just fine into the SC10 as it is!
If they weren't in the kit, the rear toe blocks are a nice tuning option, especially when you get on a dirt track!
The stock battery brace doesn't give you much options on where to put your packs, how ever, it is possible to modify it with a dremel

This allows you to position the pack anywhere with in the tray area, alternate is to buy the spangley FT carbon brace