Yeah Kobra, I got the price factoring to work nicely, or so I thought, but the factor only applies to the base price but as the pricing is also been done by attributes it didn't work.
For example: the smallest size blind cost £25 - if the slat width was 35mm then 20% had to be added to the price. Zen correctly adds £5 to the price in this instance. The next sized blind was £30 but Zen was still adding the £5 instead of 20%.
To get around this I set the three slat widths (25mm, 35mm & 50mm) as separate products and used attributes for the pricing and the colour selection - not as elegant but certainly workable.



