I just picked up a Glock 19 and the tool at Top Glock dates it at 12/89. I recall there were some updates to the internals in the early 1990's. How do I tell if these have been completed? Do I definitely need to have them done before shooting? Assuming I need the updates, what is Glock's turntime for this work? Should I just wait until I go to a GSSF match, instead? Thank you in advance and your assistance is greatly appreciated.