Hope this is the right place to be asking this as i have Stocks by attributes installed because i need it for selling shoes ie ..
UK5 stock 1pair
Uk6 Stock 1 pair
Uk7 Stock 2pair
and so on ..

But now here's the thing...

I have a product i sell its a skateboard deck, now this items comes with a product called griptape, we do a FREE Grip but also want to offer 1/2 price up grade to 2 others one at £2.50 and one at £3.00 also an option to have it applied or loose.
so that five attributes ...
Free
Applied
Loose
Upgrade 1
Upgrade 2

with Stocks by attributes i have to set a stock level for each attribute so that's x5 but i only have 1 of the product in stock.

i hope that makes some sort of sense to someone and you can point me to the right way or add on i need.