Well as I understand it, Mach is saying that the preliminary hearing IS Rudi's trial. It appears from the quotes I provided the kids' defense presented expert testimony on issues such as the single killer.
Do you have information on what witnesses testified not allowed to be crossed by the defense of the kids?
One point of potential confusion should be cleared up - the hearing where all three accused apparently were present may be called the "pre-trial preliminary hearing" to avoid confusion with the "preliminary arrest hearing".
The fast-track trial is based primarily upon the documents and statements from the pretrial preliminary hearing. The Italian procedural law for fast-track (or summary) trial is given in CPP Articles 438 - 444. Here are some relevant excerpts:
CPP Art. 438
1. The accused may request that the decision on the accusation be taken at the preliminary hearing based on the available elements of evidence {but certain other evidence may be gathered at the decision of the judge} ....
2. The request may be submitted, orally or in writing, until the time when {conclusions are formulated by the judge on the pretrial preliminary hearing}....
3. {The accused's intention shall be authenticated by his signature.}
4. The judge shall decide on the request by means of an order whereby he directs a summary trial.
CPP Art. 441
3. The summary trial shall be held in closed sessions; the judge shall order that the trial be held in open court if requested by the accused persons.
So, the summary or fast-track trial is a trial that follows, perhaps immediately, the pretrial preliminary hearing. It may include elements of evidence beyond the pretrial preliminary hearing, but is based primarily on the evidence as presented at the pretrial preliminary hearing. The fast-track trial is normally closed (unless a public trial is requested by the accused), so that only the motivation report is available to the public.
The lack of information on exactly what happened during Guede's fast-track trial is explained if the trial was closed as allowed by CPP Art. 441.
Micheli was the judge for Guede's fast-track trial and for the pretrial preliminary hearing. The motivation report (Micheli court MR) is available:
http://www.amandaknoxcase.com/motivation-reports-appeal-documents/