I have a Walsh with CR500 linkage. I only race MX so I can only talk about feeling on the track. I used to race an 89 stock frame with all kinds of aftermarket goodies (Laeger +2 arms, TCS shocks etc). I thought the stock R was an awesome feel on the track. But when I got on my Walsh (with shocks that were not set up for my weight at all) the difference was night and day. I was riding faster everywhere on the track, jumping more, just overall it could be described as "heaven". I immediately after that first race on the Walsh kicked myself for not doing it years ago.
Mike Walsh used to live in CT (before moving to FL) and race the same series I did. Mike would show up on Sunday with bare metal A-arms that he built the night before. It was always a treat to see the new items he created each week back then.
I never had issues with fitment of parts with the Walsh. Yes, it is heavier than some other frames but I would not trade it for the world.
