Ignore my last post ive worked it out, by taking 2cm off the v a_space_H and the a_space_V I can now get the correct number of bays required
I am very deeply indebted for your assistance
Thanks again

Thanks again. but from the 5th measurement in either direction i.e 503 high and 590 wide the extra bay is not added in. So a rack that is 598h x 704w still only has 5x5 instead of 6x6 and the same with the rest of the larger sizes always a bay less

Thank you for your persistence in this matter, the measurements are what have been confusing me also. the width and height sizes are a maximum. So a rack with a maximum width of 818mm and a maximum height of 503mm has 7 bays of equal spacing wide and 5 bays of equal spacing high, so really each time a bay is resized the others are spaced equally between the measurements hope you can understand it. I have included a example picture

wine rack 1.skpThank you very much pcmoor that is exactly what I needed to do, but there is a problem which is more on my part in the original drawing. I've added it to the model, when scaling up the dimensions don't work as they should. Maybe I should have just used one bay to start with?

Can somebody please help me, wanting to draw a wine rack as a dynamic component. I have worked out how to keep the sizes in scaling but I want to be able to resize so it looks as in the image

wine rack