The engineering is nothing new, all been done before, no research and development involved whatsoever, you have a motor mounted on a bit of MDF, a belt which drives either a sub platter or platter which rides on a bearing, an arm with a cartridge on the end, connected to an amp, simple. Then it's down to how quiet the motor and bearing are, how well the speed is controlled and how well it's insulated from its surroundings. Record players are a problem when it comes to choice, as you can't set ten up in your living room and do a comparison. Years ago I worked for a TV and hi-fi company, I used to go out and set up and demo the stuff, I would be a rich man now if I had a pound for every time the client said it sounded a lot better in the shop, shops also have a tendency to lead you towards buying items with a higher profit margin, or items they are having trouble shifting, not always in the customers best interest. So in conclusion, the projects look a nice bit of kit but are basically a record player, nothing overly special.