Hi,
I’m working on a project to put together a blueprint for a basic guidance setup using AgOpenGPS for grassland use. Spreading fertiliser and spraying really is all, no need for auto steer or high precision. This is work that’s normally guided by looking sideways at your wheel marks 6M or more away in the field and staying the same distance from them so anything is better than that 
Cost is one of the biggest drivers in my project, I’m trying to make this as accessible as possible for the small farmer.
I’ve already been posting in the light bar thread and have that bit figured out so now I’m looking at the huge array of options around receivers but also the inclinometers and the like.
This type of work doesn’t need centimetre accuracy, 30-50cm would be enough, what it can involve is relatively high speed work in modern tractors and the ground will tend to be more hilly than your typical tillage field.
What should I choose for the GPS hardware? I don’t have a free RTK option available and I’m hoping not to need one. For my sub 50cm target do I need an f9p or is something like an m8p sufficient for pass to pass accuracy?
Also what about inclinometers/accellerometers? these are important for hills right?
Would the dog2 bring much benefit in my type of application over the cheaper bno+mma solution?
As I say, budget is a key factor here, trying to come up with something thats only as expensive as it needs to be.
Cheers,
John