whos done the 4tec carrier mod to their rustlers?

[blueb8llz]

yea i hear them plastic ones are super duper weak, but i was still gonna get the plastic ones cus of their price. but after the way you guys said it, shoot, im def. gonna get the aluminum ones.

i was told to use flanged bearings. but i guess i can use normal bearings and just use the teflon washers. do you know what size washer..i think i researched 3mm, but can you confirm that?
so will i need two washers on each side..a total of 4 washers? or just one on each side for a total of 2 washers?
and if i dont need flanged bearings, then why even buy the normal bearings? doesnt the stock rustler vxl use 5x11x4 size bearings already?