lewmar mainsheet traveller track sizes

[Birdseye]

I need some spares for my mainsheet system but I cant find whether my system is a size 1 or size 2. No markings on it and lewmar dont seem to know either. The track itself is trapezoidal and the width on the top surface is 30mm and on the bottom is 35mm. The torlon balls are 8mm

Anyone know the answer?

 

[pvb]

According to Lewmar's website, size 2 uses 7.8mm torlon balls, so yours may be size 2.

https://www.lewmar.com/node/11427