My opinion is that:

No further performance qualification testing is required as long as production requirements are in line with welder testing.

However you might want to take a look to see if you require further procedure qualification testing, with a special emphasis on post weld treatments as it may relate to your base/filler matching.

I'm assuming that you're using GMAW, as long as the variables in D1.1 Clause 4, Table 4.12 aren't changed you should be good to go for welder qualification. I would, however, definitely make sure your PQR and WPS is still applicable.