will removing the app_info trash all the work I have on board the computer?
Removing the app_info will mean any uncompleted work is lost, so report any completed work first,
on the next scheduler contact after restarting Boinc (after removing the app_info) the scheduler will start resending the lost work to the fastest device (really the fastest app_version(s), ie GPU apps),
the exception is it will expire any VLARs as it can't send them to the GPU(s) app, so try and complete and report any VLARs before switching,
There is a trick to switching, if you copy all your workunit data files to a safe place (~366Kb for MB, 8Mb for AP), set NNT, remove the app_info, restart Boinc, wait a moment,
restore the workunit data files to the project directory, unset NNT, Boinc will ask for work and when it gets resent it will skip downloading the files as they are already in the project directory,
as soon as the scheduler request is complete, you may do another scheduler request (no need to wait 5 minutes), the scheduler will resend another 20 tasks.
Claggy