Brake rebuild

And we found the problem with the spongy brake pedal. The caliper piston seals were melted! They’ve done pretty well though as the calipers haven’t had a rebuild since new and they’ve had about 6 years of track abuse.
While we were at it we thought it would be a good idea to upgrade the caliper pistons from alluminium to stainless steel for less heat transfer through the piston into the brake fluid.
All rebuilt, back on the car now and bled up with Motul RBF660 brake fluid as per normal.