I think there has been a misunderstanding by Orni.
The MSTMS truck patch unlocks the truck & bus vehicle types using a hack - it is designed for non-truck (TomTom Start, Via, GO, etc) devices running these navcores:
- 12.075.3065980.74
- 12.075.3065980.84
- 12.075.3065980.94
Real truck devices (TomTom PRO) will be running the following navcores and do not need the truck patch (the standard MSTMS patch is fine) because TomTom already knows it's a truck device:
- 12.101.1102232.101
- 12.104.1738032.101
If your NAV3 is not a truck model, do not bother installing a truck navcore as you will be stuck with only passenger car & camper options as TomTom does detection of the device model - it does not simply enable truck/bus just because you are running truck software.
MSTMS and others already did some basic/preliminary testing and determined that the routing for the non-truck navcore + MSTMS truck patch changed depending on the vehicle type & dimensions.