I have 2 suggestions to improve the web site:
A “Wish List” so that finished models can be prepared for ordering, then saved for the future. Then models from the Wish List could be added to the Shopping Cart with a single click when ready to order. Alternatively, the Shopping Cart could be made to save its status from one session to the next, which I don’t believe happens now. In that case, models could be added to the shopping cart and would stay there until the order is finalised, e.g. other models added, at a later date.
The ability to set a default material for a user. This would avoid the need to select material type each time a new model is uploaded, and each time a model is reordered. A further feature would be the option to select a material type for each model. If selected, this would override the user’s default material type. In either case, the material type could still be manually selected to a different material at time of ordering. The defaults would save time and repetitive steps when ordering and reordering items, and also minimise the risk or ordering something in the incorrect material.