Thanks for asking, this has been asked before but I'm not sure I've clarified. Pre-orders are 25%. GMTOs are 50%.
The difference between pre-orders and GMTOs is that a pre-order is for a model we have already decided to stock, and may even have incoming stock of, and a GMTO is a member driven project.
OK that makes sense, except I paid 50% up front for my stock Galway Pre-order...haha! Not that it matters, now, but for the future I'd like to have it straightened out.