Hi,
actually, the selection of the Helix models is mainly used to compute the DSP consumption and use two DSP for compatible models.
I have only an Helix Floor model and the Helix Native plugin, I am not able to test on other devices, but I would be happy to have users with other models doing some tests and or asking for specific features/settings.
Regarding the issue with the Strymon pedals, can you send me a screen capture, or the json file ?
If you have a Github Account, do not hesitate to raise a bug with the details, I would look at it and fix it with best effort.