I think that sounds reasonable.  I wasn't aware that you could not select the other guidance options with a headland but I have only infrequently used them. 

I have not used the ezboom with the sprayer yet, just the planter.  Need to put installing it in the sprayer on my "to do" list, but I'm not sure how I'm gonna accomplish that when we are still planting....Suppose the bottom line is that I'm gonna end up buying more parts. Seems like there's always inevitably "escalation" on these precision projects.