Put a small drop off Prolong or Duralube on each bushing and a drop on the comm. It WILL make a difference. I don't usually put the motors in water that long. Take some copper polish and a q tip and insert it in the can up against the comm. turn the armature back and forth a couple times and then spray the motor out with simple green, and then apply the lube. Make sure to spray the motors out after every run (VERY IMPORTANT!) I like to run the Hard grease under the friction plate, but most people prefer that softer grease and a soft spring. I run the Hard Tamiya grease, yellow Tamiya spring with 40wt oil and a relatively stiff rear pod setting and for the Tamiya rubber tires it works very well. I usually run the 94/23 spur/pinion. Oh and 1700s are the way to go. You don't need 2400s and the 1700s are lighter!