Yeah I've heard about the monoprice delta. It looks like a sweet bit of kit, especially for the price. The extra features it has like the wifi, color touch screen and so on are pretty amazing at that price point, I'm kind of surprised they can afford to sell it at that low cost. This is speaking as someone who's looked into sourcing components direct from china at bulk pricing. All the components+shipping(eeep, fully assembled and all metal) would cost pretty close to $200 but they're done it. Does it compromise on the motors or something, I can't find a good look of the motors on their website but it looks like they've gone all in.
Out of curiosity how big will your custom delta be?