To answer your questions:
1. Yes, but you can set the time it waits for an answer and select the default which will usually be to boot Windows. The timer can be reset online from additional options on that screen, but the lowest it goes is 10 seconds, I think.
2. Yes, if there is a boot menu set, Rescue Media Builder will offer the option to remove the current boot menu option.
3. You can, and RMB will note if there is a new version of Reflect that could be built if you elect to build it. Rarely does a MR update require a rebuild, and it almost always noted in the release notes for the new version. Otherwise, the release notes will advise you can skip the rebuild if you so choose.
My personal setup's answer to those same questions. YMMV.
1) I set the wait-for-answer time to 2 seconds, because striking any key while waiting suspends the timer. The "any timer value you want" is set in Windows Settings / Advanced System Settings / Startup and Recovery.
2) I seldom choose to remove the boot menu version. However, I always build the boot menu version, and a USB Flash drive version, and I also build an ISO file version that can later be used to rebuild the flash drive with a past version.
3) I rebuild so that almost always I am using the latest boot menu. And after doing this, I reboot my laptop in Rescue Media mode to verify that I can still access all the disks on the current system, and the folder on another system that contains the backup images that I would have to restore from.
I'd also offer this caution: you MUST have a working non-boot-menu version of Rescue Media in the event you must restore your System Disk because of a total failure of that disk. You cannot restore
the system disk from the usual online version of MR that runs in Windows.
Edited to fix typos/missing words.
L.W. (Dan) Danz, Overland Park KS
Reflect v8.1.7784+ on Windows 11 Home 23H2 22631.2792+
Reflect v8.1.7784+ on Windows 10 Pro 22H2 19045.3693+
Reflect v8.1.7638+ on Windows 10 Home 22H2 19045.3693+