I have an F90BT. Is there a way to preload a custom route into the unit prior to starting out on a trip? Before everyone starts peppering me with the obvious, I want to be able to create a custom route that may or may not be the shortest route. Kind of like Google where I can drop off main roads and take back roads, etc. Is that like creating a multi-point route

Most mods, you can use multiroute to create different routes to the same location depending on its settings. You can also change the route settings, create the route and then save the route. You can then change the settings back to normal and your route should be saved with those settings initially applied. I have not tried this out, but it should work

You can use the AVIC FEEDS PC app to create a custom POI that the unit will allow you to route to. But no, there is no way to create a pre planed route and upload it to the unit.