So if difficulty goes x20 then you are at 200 days for a D3 payback assuming the same price for Dash. If it's x40 then 400 days. I think x40 is the outside amount and it will be less than that. So yeah D3 isn't a get rich quick opportunity unless Dash pricing goes up a lot. Speaking of this, interest is definitely increasing and having all these mining manufacturers drawing interest can only help so I would expect Dash price to start tracking up over the next six months.