This is V1 of the mod, as I don't have much time for the next ~2 months, I'm doing all the final changes for V2 of the mod.
That includes manual dirt, flexible hoses, more scripts, new model parts, reworked model, new textures and a lot more.
It's both the 9R and 9RX, so when you choose the RX tanks in the store, be sure to select RX engine and either Crawler or Row Trac as well.
The large size is due to the high poly model, and lots of textures, but that will also change in V2.