Just a word of warning/caution -- unlike other chipper projects where offering custom options and alternate chips, colors, and denoms are common, dealing with GPI is very different. Those types of requests are basically unheard-of in their business model.
The more you try to stray from the model, the less likely it becomes that the order will be approved.
The more you try to stray from the model, the less likely it becomes that the order will be approved.