riffe power-band upgrade

[rifmaniac]

I have a Riffe Comp 3XS
the power bands are starting to get old and I'll soon have to make new ones;
the original bands are 14mm width/66cm long blond latex and the gun is quiet powerfull
but I would like a bit more effective range;

I can only get 13mm or 16mm or 18mm black latex bands;
*would 3 16mm bands go onto the gun?
*would it be better to use three 13mm bands and make them shorter?

impatiently wainting for your suggestions

PS: I use a 7mm shaft

 

[rifmaniac]

your answers are simply great

I finally made myself a double notted 64cm 16mm black latex power band; it fitted quiet easily on the gun with the two original 14mm power bands
I'll probably try the stuff tomorrow; hope I'll win a bit of power and range