Thank you for the replies, I am always happy to see videos of Bert Smorenburg.
The pad sounds already set up do keep in tempo and pitch on the PA900. I felt like I was pressing once to turn on and play through, once more to stop the pad, rather than retrigger the sample like Bert does.
In Sound mode, I was able to tweak an Old Portamento sound down two octaves, and to have a low pitch bend. That sounded close enough for my needs. I can save it as a user sound, but back in Style Play, it keeps the lower octave note but not the pitch bend info. This is the same for me so far in Sequencer mode for recording as a sample.
I hope to get more time at this before the weekend, I may just try and get a wave file of the synth sound and fade it out before the strings start.