I noticed that they have a new "99041" model which appears to be IDENTICAL to the 99021 "limited" run that CZ USA brought in last year. My question is, can CGW apply the pro package upgrade kit to my 99021 gun? or are there differences in that model that would cause snags. I've been dying to send it in to Dave for a while, but when I originally called a year ago they hadn't gotten some of the parts needed to work on it (one being the safety as it used the same one as the new Shadow II which had just come out)