Hello All,
I use a mix of Atlas and PECO code 100 turnouts on my HO layout, all with remote switch machines.
Some are paired together so one controller activates both turnout switch machines on the crossovers, sidings, and wye.
I only pair Atlas with Atlas and PECO with PECO. Both use solenoid-type actuators.
The points on the Atlas turnouts are held in place by the turnout switch machines.
As has been posted the PECOs have a spring that holds the points in place.
The force needed by the PECO PL-11 side mounted turnout motor is significant to overcome the tension of the spring. To the extent that I needed to install PL-35 Capacitor Discharge Units.
Another problem with the PECO turnouts I have is the top of the throw bar linkage pin is rounded.
If the turnout motor is not securely fastened to the layout base, when activated, the link from the turnout motor will jump over the throw bar linkage.
To solve this I drilled and tapped a hole in the throw bar, installed a 0-80 x 1/4-inch machine screw with a #0 flat washer on top, and secured it with a nut on the bottom.
Now when the turnout motor(s) are thrown the linkage does not separate from the force needed to overcome the tension of the spring.
When using a slow-motion Tortoise type turnout motor it is recommended the springs be removed on the PECO turnouts.
I have no experience with servo-type turnout motors.
Hope this helps.