RCA is Roll Center Adjuster...(too lazy to write again)
check out this link
(its not for MarkII model review but its kinda give u an explaination on what is RCA and its function)
so since the aftermarket RCA for Marker is quite expensive(around Rm3++ not including shipping and other tax..Direct order from japan),so i decided to custome it with the help of a local machine shop near my place..
First up,need the old absorber for molding purposed
using manila card,and 1inch thick metal,shaped is cut using the heavy machinery
after skiping a few process,the shaped of the RCA is form and the hole for screw is drilled
the skiming machine,to shine the metal
this is how the RCA for Marker look...cost less than Rm200
As the aftermarket RCA would use aluminium material instead of metal (for weight reason) i simply choose metal meterial becoz its cheaper and considering how heavy my Mark II is,what does a few kg gonna matters hehe....