informed minds may differ, but here's my technique for my Hypers and two Align 91s that I have or have had.
First, spend a minute with the fuel system and make sure there are no leaks, and the plumbing is correct.
Second, Because you can't see the throttle barrel, you have to guess as to where to find the idle for that initial run. one way to do this is to bring the trim back while watching the servo. when the servo stops moving, the barrel is fully closed. Now add 6 -8 clicks of trim to slightly open the barrel.
Third: Make absolutely sure that your stick in down and the engine is in normal, and the throttle curve for normal is linear from 0 to 100.
Four: Unlock the fuel clamp which I am assuming you have.
Five: With a frim hand on the head, and the transmitter easily within reach, engage the glow plug and hit clutch with the starter. if it pops but won't start, move the trim up 2 - 3 clicks until it fires. If it is obviously a higher idle than you want, move the trim down a bit.
Six: Go into a hover and let the engine settle in. It will be very rich, which is fine. Simple forward flight is good for break in because it will open the barrel allowing the engine to reach operating temp without really loading it up with collective.
Seven: It's normal for motors to go lean when they are new when fuel starts getting low. Thus, you might want to land when you get to 1/4 tank or so and refuel.
Once you get past that initial flight, you can start tweaking the needles, but go slowly, and adjust the high speed first, and then the mid. once they are where you want them, forget about them.