It looks to me after seeing all this data that the R1 seems to have the best consistent accuracy. It also seems like the Bad Elf is right there with the R1 even in the tree cover when holding it in the correct position. If it was up to me I would stick with the Bad Elf for the money if it meets your accuracy specs on paper.
We could potentially look into post processing the data from the Bad Elf too.
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