Do All Nuvis accept Routes from Basecamp

Only those that have either trip planner or older nuvis that use route planner.

There are a couple of older nuvi models with Trip Planner that cannot import routes ... notably the 1695 and the 2300 series (at least the North America versions. not sure about Asia or Europe models) .

Here is a Garmin FAQ with a list of devices and instructions for importing routes: https://support.garmin.com/support/searchSupport/case.faces?caseId=%7B65814150-50b3-11dc-4ec8-000000000000%7D

Yes, quite right, I'd forgotten about those :)