I already own the RSC brake set and 180mm rotors as they were on another bike and I'd just have to have them swapped over. Thought to change the chainring just to make the gearing a bit easier on myself but I've managed okay so far but I could go either way. The significant weight loss would come from swapping out the dropper for the I-Beam saddle (now I know the loss of performance and it is significant but I've ridden trails without a dropper and think I would be alright though there would be some discomfort but I think the trade off would be viable.) The choice of saddle being the Deity Sidetrack is because of low weight and price (plus it looks awesome.) Not sure of that particular saddle but I've ridden Deity Pinner and the Mainline Ti. Thought to ask to opinions on here as otherwise this forum and all forums are a bit of a hit or miss.
Removing the dropper would certainly take of a lot of weight but it would also remove a lot of performance and fun. If you're going that route you could shave some weight by removing the suspension fork and going rigid.
Maybe look elsewhere for some savings? You've built up a banger of a bike so I'd hate to see it limited that way.
Just built up my custom Large 2017 carbon Patrol. Chris King hubs, DT swiss rims and spokes, tubeless E13 TRS+ tires, XO trail brakes, Spank Spike 777's, XT drivetrain, 125mm Stealth reverb, Temple Lite 50 mm stem, Cane Creek 40 headset, and 160 pike solo air rc3. 30 lbs with about a pound or so of Shelter tape. I'm 6'0" and 190 lbs. Taking it out today for the "maiden patrol."
First spin out on my new patrol doing some uplifts! Bit of getting used to it needed after riding the hardtail all winter! What do you think of the new GoPro's stabilisation too, is it a yay or nay? cheers!