Has there been a new design for the brake reservoir caps.Mine have vent slits which pose two problems,1 they leak even when vent is toward the rear and 2 the brake system should be SEALED ..whats up with that..read the brake fluid bottle it says to use a new or tightly sealed bottle. I currently use a piece of Tyvek (house wrap) under the cap which keeps the fluid in but still allows air in the system. Anyone with other suggestions as to what to try next...