#B11-OP3A - Optional parts set for BD11 Upgrade 3

Aluminum screw & titanium ball end that reduces the weight of the upper part of the chassis and promotes a lower center of gravity as well as weight reduction. 

All are high-precision parts manufactured by carving, and are gems that improve the quality of machine make-up. In particular, the aluminum screws that fix the upper deck and bulkhead cap have achieved a significant weight reduction, and also affect the running characteristics, making it possible to finish with a supple feel.