Pitchbend, Vibrato and Gen for Synthesis

Hi guys,

I've been working on a physical modelling synth based off one of the tutorial patchers and have got stuck trying to integrate in a working Pitchbend and Vibrato (I'm still pretty new to Max so am still getting to grips with how to think in a way that works with Max's logic). I've attached the files that I'm currently working with and would love it if anybody had any suggestions as to how to implement this properly (I may be going down entirely the wrong route with how I've started trying this).

I've also been having an issue with the model where any note that I input to the system hangs for an infinite length of time unless my dampen and decay settings are set particularly high. If anybody has any idea where I'm going wrong, that would be amazing.

Thanks for your help in advance! :)