if the fluid is leaking out primarily at the bottom of the caliper there is a capped off hole that is capped with a small allen screw on the underside of the caliper. i suspect the left side and right side caliper housings are interchangable and the unused hole is capped off. that might be the source of the leak if no others are apparent. good luck! i just had so much fun with my caliper rebuild i was wanting to punch a party clown.