flm hybrids problem

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well i tried flatening the end but still no use , i have stripped grub screws now , i think it m8 be the cups ill check with the lhs today if they have diff cups but as for the arms the hole in the rpm arms get larger when it gets hit so minehas alot of slop and play int he arms


is the flm ext arms same length as the rpm arms ??


because i have the rpm true traks in the rear and i want to keep the lower arm and replace the upper arms with the flm ext upper arm , and replace the whole front arms with flm .