The extension allows to specify option combinations as product variants and specify properties for them like quantity, image, weight.

Main Features:
======================
- ability to specify model, image, quantity, weight for each variant;
- ability to specify discounts, special prices for variants;
- variant options and regular options can be combined in one product;

You can see how the extension works in this video. Please notice this video was created on Opencart 2, but the functionality is the same.
https://www.youtube.com/watch?v=P9SMy_eVhTE

Demo Store
======================
http://demo3012.ka-station.com/admin/
login: demo
password: demo

Demo product

Release Notes:
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- User interface is in English language only.
- the patch is fully compatible with the default theme only. If you would like to install it to a custom theme, a code adaptation might be required;

Feel free to submit any questions in comments, I will reply to all of them here or directly by email.