Originally Posted by
Roelof
Jus mount a smal hairband between the ballink on the carb and the main needle. If you need more tension then just wrap the band 1 or 2 times arround the main needle.
I second that...
You can get small hair bands from your local drug store/walmart/target in the hair accessories aisle.
Make sure you have a good strong throttle servo because trs or bands are know to wear cheap servos out.