No one has belly ached about the price because dart has a reputation of making decent stuff at a fair price.

I agreee it needs to be a copy of an R3, or even an X block with roller cam provisions, KISS. Make it sturdy and let the high dollar guys spend the money doing the fancy upgrades. You won't sell many trying to sell just to the big dollar guys, only so many people can afford $6000 blocks, if you build a $3000 block there is a whole lot bigger market.