OK, here's a CDI related question. Im using the CDI ignition that I bought from Just Engines UK - its a RCexl ver2 ignition unit with plug cap for 1/4-32 spark plugs.
Here is the close up:



I soldered a thick guage wire to the tip of the exposed braided wire,
heat shrinked it all the best I can and grounded the other end to one of the bolts on the engine mount. (but at the top, the braided wire still shows it self a little.)

Here is my own setup:


The spark plug itself is this one:


I measured the resistance of the plug on both ends and found it to have no resistance. As Im new to the stuff, I presume the wire from the ignition unit have a resistance wire incorporated to it to prevent RFI.

My question is this; will this setup create unwelcome RFI to affect my servo wires or 2.4Ghz receiver?

On my trials it does affect it when the ignition wire is in very close proximity to the servo wire. (the servo immediately starts to jitter violently- look above). But will it do the same when its 20-30cm apart?

Is it beneficial to incorporate a shielded metal cap on the spark plug like the ones used with bigger spark plugs? I cant seem to find where its sold?

Basicly the 1/4-32 plug cap version of this one: