I am wondering if it is worthwhile to create a maintenance matrix for such components as the IAC, MFS, O2 and others (struts)? I raise this question as many of us have Reattas with mileages in the 50k to 100k (or more) and the concern of declining performance or component failure exists. The matrix could consist of such things as "basic function, problem symptom, recommended cleaning mileage, recommended replacement mileage and/or other considerations." I realize that some of this info maybe available in various sources but I am not award of a single source..............