Regarding tnap7 for osmini4k, I have only problems:
Only 1 of 4 or more trys to load, the image is starting, no matter if the box is connected by wire or wifi.
Most of the trys the box stays in "boot" (box display), with black screen.
When I get lucky and the box loads the image, usb ports are not recognized by the image, hence there is no way to make a backup or to load a backup. So, after a lot of strugle, I manage to load the backup of the last version of tnap6.
I will see how tnap7 works for osmio4k+.