@AsciLab
If the pre-order period (eg. 30 days) generates so much demand that you can't keep, then that alienates the customer. Customers today in Western liberal democracies are an impatient lot. Remember that they are used to the 'order today- delivered tomorrow' from the likes of Amazon Prime.
To ensure your supply can keep up with the demand, please consider the following options-
1a)
The free shipping period has now ended. Thank you to all of our supporters in the first year of AsciLab.
The all inclusive price is a great sales strategy, except it it blows demand out of the water. And all your customers know, there is no such thing as "free shipping". Somewhere, someone, is getting paid.
1b) Also consider your manufacturing focus on your most profitable models & best selling models, delay the release of better models. This will allow you to re-invest the cash flow into R&D of future models. Customers will understand this because they don't want you to go belly up. And don't release your best models at the same time as lesser model- stagger the releases to avoid product cannibalization or product.
1c) Any colour the customers want, as long as it's black (or white). Focus on one colour for now...
And upsell - extra charge for other (or custom colours)
Leave them wanting...