I specialise in PROMPT and Justine Rhind is the PROMPT trainer for the UK and either of us should be able to help you.
I would highly recommend a PROMPT intro course if you haven’t, especially if you have an interest in treating motor speech difficulties.
We can help you understand and observe the specific movements of the speech sub-systems to identify where the errors are occurring. We can also help you to understand which movements to prioritise as well as speech movements develop in a specific order. So identifying what aspects of the motor system is crucial for achieving sequenced movements for speech. Please feel free to email me firstname.lastname@example.org