I just got my Hotas warhog, I'm still in awe at the difference from my cheap joystick.
I put these binds into use and they're great so thanks a lot for them.
In regards to the throttle stop, I've skimmed through and don't see anyone coming up with a solution. One thing I noticed is the in game toggle binding is annoying by itself because it just kind of goes ballistic toggling back and forth even when you use it on it's default key assignment.
Before I read through the whole thread I followed your format trying to make an alternate for it and got this.
--Alternate Throttle Stop
{down=device_commands.RUDStop_lock,up=device_commands.RUDStop_lock,cockpit_device_id=devices.ENGINE_START_DEVICE,value_down=1.0,value_up=0.0,name='Alternate Throttle Stop',category='Engine'},
Which as you probably already know will not work for the actual throttle stop position.
However, I find that it still works better than the default binding, and what I did is bind it to the right engine operation switch in the lift to start position. So I use the left for the engine starter, and the right becomes the engine stop position. It works quite well and it doesn't flick on and off like the default toggle will, you can hold it up indefinitely and it won't make a sound, then release and it moves to it's second position.