BMT 701 & 984 option parts
New from BMT for their 701 and 984 platforms come these option parts, beginning with this brass battery support. Adding an additional 50 grams to the 984 it can be used to fine tune the car’s balance and is a direct replacement for the original part. For the 701 there are two different pairs of wheel hubs in -0.75mm and +0.75mm versions as well as updated reinforced engine mounts.
Source: BMT [bmt-team.com]