Fujimi F430 Challenge Brakes On a Revell 612?

Has anyone had any experience doing this? The 612 brakes are really wimpy looking, need bigger brakes!

It's not too difficult.

--Drill a hole and insert a rod of 2.0 mm dia (don't glue it yet.)
--Dry-fit the rotor, wheel and tire, and check how they appear when the body is fitted to the chassis.
--Adjust the depth of the wheel & tire by adding sandwiching a plastic sheet between the rotor and the wheel hub, or cutting off a portion of the hub.
--Glue the pin and rotor to the hub.

I used the rotors that came with one of Fujimi's 18" wheel set.
http://i21.photobucket.com/albums/b258/hirofkd/612/p8040098.jpg (http://i21.photobucket.com/albums/b258/hirofkd/612/p8040098.jpg)
http://i21.photobucket.com/albums/b258/hirofkd/612/img_1056.jpg

Thanks!