throttle return springs for IDF's, what works? Options

[machina]

I tried this dual coaxial compression spring setup but it feels like crap and is really hard to push. The carroll smith books like a compression spring because if it breaks, you still have some spring action.

How do you guys rig your throttle return springs on IDF's?

Also, does it help to lube the inside jacket of the throttle cable?

thanks,
dr

[lapuwali]

Aircooled.net sells little springs that go on the carbs themselves right at the throttle arms, and are good backup if your main tension spring breaks. I used those, and a simple tension spring between the arm and one of the trunk springs. Not too heavy, and three springs have to break for me to have stuck open throttles.