With 5.511 I implemented the change that should allow for this, here is an example for F1:
F1.bttpreset (15.7 KB)
They key changes are:
1.) You can now have multiple shortcuts with minimum hold times > 0
2.) The "Execute Action Sequence After Timeout" action got an option to immediately continue executing the remaining actions in the original action sequence. (This was how it was originally intended but some refactoring a long time ago changed this behavior)
