anyone return to snowboarding after TKR?

i'm new to this forum but have posted similar request elsewhere i do intermediate-level, recreational snowboarding for about 2-3 weeks every winter, in the powder of Colorado -- nothing too fancy, just cruising the blue runs (no jumps of any kind -- hate moguls) i go thru 3-4 months of intense conditioning (aerobics, free weights, machines, core) to get ready, esp. for my bad knees -- my R knee is the worst, right now, w/constant pain and clicking/popping/snapping -- the R knee had open ACL repair 1988, ACL reconstruction 1990, post-surg infection 1991, hardware removal 1992, arthroscopy 2004 -- been doing PT, Synvisc, cortisone, etc. for last 10 years but now OS says only thing left to relieve the wicked pain is TKR -- i'm hoping for 1 more round of synvisc (maybe we'll try SynviscOne this time) and then go snowboarding in Jan/Feb 2010 (hopefully, not for the last time) please share your stories if you got back to snowboard (or wakeboard or surf) after a TKR -- i prefer to rest on my knees so i can take off on my toeside -- being a female, that's easier for me than struggling to get my (big) butt/hips off the snow if i rest on my heelside -- i wear neoprene hinged knee braces (with or w/out metal stays) under thin kneepads -- will the scar site after the TKR need more padding? thanks alot!