You can run the Blues down to nothing and you won't see a difference, at least that's my experience. You may consider getting a new set of pads and either bedding them in properly and taking them back off so you have some on the trailer already bedded or just install new ones, bed them in properly and keep the 50% set as spares on the trailer as they are alreay bedded. Same thing with rotors, keep a spare GOOD set that are already seasoned in the trailer just in case. I use AP600 fluid, Hawk blues all the way around and Brembo stock replacement rotors and easily get a season out of them with alot of events. The Brembos are the best I have tried and are about $35 new, I never turn or surface them, just throw them away and start with new. Good Luck, Chris