Allow Tune Search Filtering by Every PI Class - Including Classes Below a Car's Stock/Default PI

FM8/2023 feature request: please allow/enable tune search filtering by every PI class for every car - including classes below a car’s stock/default PI.

Example:
• 1980 Renault 5 Turbo’s stock/default PI is D-316.
• Installing heavy ballast drops this car’s PI down to E-class.
• The “Find Tune” search feature does not allow filtering a search for this car’s E-class tunes (presumably because the car is D-class in stock form?).

Without this, players must scroll through the entire unfiltered & unsorted list of tunes across all classes to see if there are any shared tunes for cars that have been downgraded below their stock/default PI.

If I want to create & share my own downgraded tunes, this makes it harder for other players to find it since they can’t do a filtered search for downgraded tunes.