Garmin has a new unit in Montana series - Montana 700i. Great unit, very suitable for adventure riding. But a bit larger than previous one (600 series).
Perun moto KTM 1090/1190 GPS dashboard mount is designed to keep GPS unit tucked above the dashboard and under the stock windscreen, where the space is tight. So mounting new Montana proved to be a challenge, there simply isn't enough room there.
So Advrider inmate Smackit designed an adapter, that puts Montana 700i in perfect position, raising it from the Perun moto mount.
More info can be found in this Advrider blog post - https://advrider.com/f/threads/garmin-montana-700i.1459494/page-48#post-41868681
If interested, contact him there and he will let you know how to get this adapter.