How much gap should there be betwen the long springy metal strip and the points themselves? (excuse technical terms

The reason I ask is that I've recently bought a set from my usual online supplier, and when I fitted them the springy metal strip was nearly touching the points. So much so that I put the old one's back on. In fairness I told them about this when I ordered a few more bits a couple of days later and they sent me another set for free. But hey ho, same problem.
The previous type had a red colour plastic, while the newer one's are brown (both types are marked as Lucas).
Am I worrying unduly about this?

(proof reading this note makes it sound like an agony aunt letter



Iddy
