As far as receivers I have a couple of Leica magnetic mounts receivers that we mount on the dozer blades. They are fairly inexpensive and seem to work well for us. IIRC CM1995 and Shimmy have alot nicer receiver setups but they probably cost quite a bit more. It all comes down to your application and frequency of use. For instance, I don't have much use for a dual slope laser because the bulk of our work is terracing, waterways and general farm type work with an occasional basement here and there. But we recently finished the initial grading for a storage unit building. The building itself is level. But in a month or so we will be going back to finish the grade for the 24 ft cement driveway that goes all the way around the building. The plans show for all sorts of slopes on the driveway and will likely be a PITA with my single slope laser. But personally I don't think I can justify the cost of a dual slope for an occasional use like that. We will see, I might be eating my words in a month or so!!!!!