I've just acquired a 2019 Scott Spark RC with SRAM XX1 Eagle 1x12 drive-train. I ride in SE Texas and only use the bottom 4 cogs on the cassette - that huge pie-plate is worthless down here, while I spin out on fast sections with 32x10 biggest gear available. I want to install a smaller range cassette - one that I'll use all the cogs - cheaper and spread the wear - along with a bigger chain ring. The chain ring is easy. Anyone done this? I guess I'll need a new derailleur as well. I'd like to keep the Eagle to install on trips to the mountains when I actually need that pie plate! Thanks!!