I'm rebuilding my TZ, and I have a question on the rocket kicker. In the manual the kicker is made up from assemblies a-16713 and a-16647. There is no spring listed or shown in the manual, but it seems there should be a spring. The sling shot kicker b-12665 which is basically the same part, there is a spring shown and listed. My question, does the rocket kicker get a spring?