I am very new to the custom cue world with only 2 that I have had built. So I do not have the knowledge on bad experiences as many others on here do, nor the knowledge on the best way to deal with it. But i never have, and never will pay up front for a cue in any situation.
I will await anyone else's opinions and directions, as I am curious on how you need to proceed. Good luck to you, hope you get your cue!!