this is so you can see were you hit the target every shot something you can not do with a spotting scopeOk--- Interested in the thread. If you DIY, fantastic, more power to you, but it seems we are comparing apples (target cam) to something else.. I often self-spot thru a 25x scope. To clarify, when shooting ELR, I pull the trigger wait for the TF and look for the signs of impact in a couple of seconds, 4-5 seconds later (caliber, AD and distance dependent), maybe if you have everything working in your favor your get an audible confirmation.
I absolutely get the need for FPV for the spotter, but If you are not recording, how can this be valuable to a solo shooter?