Wow, I started this thread a year ago yesterday. Happy Birthday Thread
FWIW since the mod was done on my car I've only broken 2 arms and to be frank I deserved it both times (Car vs Concrete) so I would have to say it was worth it. I broke way too many original arms for 'no apparent reason'
I've recently taken the mod one step further by taking an unmodified pack of 501 arms and replacing the bit in between by an unmodified 501 Worlds Edition

. I'd still be intersted to know though what the current school of thought is on the BJ501 and what the most popular way to mod it is. Do you just mod the arms ? Do you bother with the bulkhead ? Did anyone modify the bulkhead to the extent that you didn't need to rip 2mm off the arms ? It looks from the recent posts that you guys are replacing the pins (The slop never bothered me. It was sloppy before I started and I was content with the knowledge that with 501 arms and 2 shock towers epoxied together that the front of my car was pretty much indestructable

)
Anyway, Happy modding,
Jon.