ok lets see here's what i do to get this thing to work for me
now you say your target delay is 4729,and you get 4728,4730 now that is good you want to hit between this range you are very close,but the reason you keep getting the same thing is casue you keep doing the same thing ;),waiting on the timer to stop,so now here is what you do because its not like hg/ss where you can hit your delay to a precision of 1 sec,but in 5th gen it is 1/60 of a sec.So what i do and you should try is when ever you hit say 4729,you don't let the timer run out try to hit it at 10 sec before it runs out and you will have a better chance of hitting your delay :)