Speaking of sprue cutters....

For anyone that is interested, just wanted to follow up. 

The Micro cutter from MicroMark are just rebranded Dspaie cutters. Got to be careful though, I found the MicroMarks blades to be flush while the Dspaie blades were offset resulting in a less clean cut. 

which ones?

just bought a pair , they are pretty dear . but, absolutely the best cutter's I have ever used . incredibly light , sharp , and so easy to use .