Chuck thats funny I was just looking at that device this morning. I just can’t justify the price. Hornady makes an ok unit for a lot less. 

There is a guy and his son that make jigs to consistently cut brass to a specific length for reforming. His company is called Zep Reloading, I had purchased one of his jigs for 300 BlkOut and they attach perfectly to these cut off saws from harbor freight. Well I spoke to him about the 7.62 Nagant brass and what I was doing. He will make me a 3d printed jig temporarily to get the job done, then if there is enough need he will probably make one of the aluminum jigs. Great product. If anyone else is looking to do this you can email him at [email protected] his name is David. 
great people and extremely helpful.