I've thrown standstills with little power to try to learn the mechanics two or three ears ago and repeating it later. It adds strain to the arm and my injuries prevent me from using it on faster throws. I haven't been able to practice it but I'm quite certain that my timing at least but likely my lack of arm/finger strength also lets the disc slip out too early on full power. I have trouble curling my arm around the disc because my strength diminishes curling to 9 o'clock and that's partially due to extreme position of the arm and partly due to the induced tightness of the forearm. Therefore slowing the arm motion being too stiff. That's why I only reach as far as I can comfortably at this time. That is 12 o'clock trying to release at 6 o'clock with the minimal power training and slipping out much earlier with full power throws. Unless I pull from out to in from reach back to right pec then changing the direction of the arm pull to linear along the chest with the elbow fully out. Then I manage 9.30.
With a linear arm pull grazing my chest all the way not putting the elbow out quite as far as it could, protecting my achy deltoids, with minimal power I do pull back with the shoulders, hips and leg work once the elbow is straightening. Just prior to the elbow becoming straight which gives me time to pivot the disc from 12 o'clock to 6 o'clock once the elbow is straight. While pulling the elbow back away from the target once it straightens out fully to maximize the spin rate of the disc. I do get a rip at 6 o'clock this way and the disc spins visibly faster. High speed video has confirmed this.
Using minimal power it is possible to clamp hard enough with the index finger and the thumb so that the disc does not rip flying forward. I've had the disc drop vertically or flying backward. If the disc edge hits something dropping vertically it _shoots_ away from the contact sideways. After having no sideways momentum whatsoever previously.
My arm is on the edge of perhaps allowing to train stiffening the wrist and stopping it now on harder throws. I'm sure that usually my timing with the shoulders pulling back away from the target is off and I've never been able to straighten my elbow and pull it back while holding on to the disc on full power throws. Not enough grip strength or grip lock and in any case an inflamed arm. Lot's to do in the future and weight lifting to give more muscle mass to absorb the stresses of snapping hard.
I've been able to get my arm to snap really fast compared to usual without the disc in the hand late last week. Concentrating on stiffening the wrist late in the throw trying to stop it. The feeling is different using the wrist as a spring opposed to hinge that I've been forced to use so far. Too bad my strength is lacking and the only time I've played after this I was tired, slow and stiff and with a disc in hand the added muscle stiffness made trying to stiffen my wrist impossible for me. My arm under the elbow wasn't as loose as usual and after two rounds trying this at a field was pointless because I couldn't generate arm acceleration. I compared Rocs, Teebirds and Bosses and it would seem that Rocs are easier to keep the arm muscles loose until late in the throw. But being wasted from work and playing makes snap practice impossible. My tip is to come fully rested to snap practice. Too much work for me in the near future to be rested
Without using the Brinster grip and pulling close to the chest in a straight line trying to get the elbow out it still is difficult for me to grip the disc close to 9 o'clock without stiffening the forearm, wrist and fingers with tall discs. I think part of this comes from not punching the elbow out toward the target fast enough before the elbow chop. Babying deltoids

My small stature and hand are probably at fault too YMMV. I think small diameter thin discs help in learning to pivot the disc more degrees along the edge of the disc. The benefit to more hand rotation along the disc edge is to gain time to spin it faster=harder snap. I've yet to try the Brinster grip trying to snap a disc but that's in the cards for near future. If only I could get the rest to try snapping at higher speeds grrr.
Flat shots need running on the center line of the tee and planting each step on the center line. Anhyzer needs running from rear right to front left with the plant step hitting the ground to the left of the line you're running on. Hyzer is the mirror of that.