Hi Troy
I have been busy last few days and i can see you have as well on more interesting things than i have .
I have to double check the problems you have had but a quick read i gather its not working
This is a good thing as you learn from your mistakes never from any thing that works off the bat when you work out why you will never do it again .....; )
learning and still am on cameras a lot of help from Gary got me to the point i could sync the video watch on PC very much a Gary harry win ,see every one is helping here and better mega minds than me .
Troy has been using the circuits i have on the flying spot camera I think Gary ...
Troy 400 to 450 is a big swing you need to have this steady as close to 400 hz no drifting ..I am pretty sure the LM311 and 555 timers monostable the voltage was 5 volts .
Use your frequency meter watch the motor speed as you start it up from power up ,its best to have your voltage to the motor low than high ...i think you have to much voltage feeding that Mosfet ...i always found if it will not get to 400 hz just increase voltage to the motors Mosfet a little till the PLL gets it under control...to much voltage and pll is not controlling the motor your pot is in a sort of manual way not what you want.
Check for mistakes in the video sync mixer fault finding should fix that .
Use Garys software i found the scope very helpful viewing the video and sync and adjusting it all .
Edit/adding stuff as i am reading past posts//////
I used Lm317s for the motor control troy not a 7812 so theres one problem
Again i used 5 volts as i recall it doesn't work well increasing the voltage reason i put in Lm317s to adjust every thing on different circuits just found 5 volts on the timing part worked well.
Don't worry about making mistakes every one does not that we want to but happens i still miss my green laser