[Nonfractal]

Here's one mount and spring combination I've seen and used:

"Springboard"
Typically used on slot.it style 6 point mounts
The front 2 screws are locked solid and tight.
The  middle outriggers are left loose with the cheese heads sitting nicely in the chassis holes but use no springs.
The middle outriggers effectively act as bottom-out stops. 
The rear mounts are unused. No screws are used. 

The benefit of "springboard" is that you can get suspension effect without springs or magnetic units.
Springboard totally locks down the motor mount's roll. 
Screwing the fronts tight gives an anti-rollbar type effect.
If the left rear lifts, the right rear lifts with it. 

I (and others) use Springboard setup on SideWays GroupFive cars on ninco track at NascotWood where suspension springs are  not permitted in this class.
Nascot wood prohibits all magnetics probably because there is always the possibility of creating a mag suspension that would generate downforce and the club is strictly NoMag.

Springboard only works with  mounts that have 2 front screws, not with triangular mounts like NSR or thunderslot.
I have broken many motor mounts using this technique. 
The front screw holes in the pod are under a lot of stress using this technique. 
Getting the right size cheeseheads for the mid outrigger  mounts is very important.

Springboard only really work for lower power motors because the setup provides no absorption of the kick from a high power motor that causes start line deslot.

In summary: 
"SPRINGBOARD" is a useful technique when the rules don't allow suspension but is nowhere near as good as fitting a car out with springs.

I've come to call some of my other mount techniques "seesaw" "full float" and "rocker float"

What techniques do you use? 
Do you have pet names for them? 

AlanW