fyi, spoke with the folks at rossler transmission. shifting is controlled primarily by the tv cable adjustment. fewer rings on firewall side of cable bracket yields smoother shifts. more rings give more abrupt shifts. played with the adjustment and was able to get very smooth transitions (almost not noticeable) throughout entire range. note that gntype blogs covers this nicely.
for texast, carl rossler has is own 200-4r recipe, not an aftermarket kit. this build was done in 2008, and i highly recommend their shop.
dgc