C24 - variable capacitor which placed near BNC connector on top side;
C30 - decoupling capacitor for negative supply of AD8066
R67 - whith R68 makes gain +10 when pin 7 and pin 8 of J10 are connected.
C29 - high freqency correcting capacitor. SPICE requre that.
All 100n capacitors are placed on PCB, see attached image, they are marked as red
U40 key is placed in direction of USB connector
value of R70 is 510 Ohm
C26 is not need, you are right
R82 R83 used for limit current via LED's . They value is 1kOm - 3.3kOm use "152" RES for this.
"000" can be left.
Use single resistor of R73/R73 for select direction of manual beam movement. Don't forget about R65, they are connect digital and analog ground.
R66 is NOT need for you, they are use for AD9283 ADC.
Last version of schematic are attached too.
PS Use botton "Управление вложениями" in answer page to attach files.
Sorry, but i'm not correct value of U3 in schematic. It will be AD8066.