I'm happy to help you with this, however on close examination of the edge and edge explore firmware i've just noticed that explore has an additional region with info written to it. It's the same for latest fw for Edge 1000 V7.00 and Edge Explore V3.00, but this is earlier 5.20 and 2.10 compared in RGN_Tool:

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Explore has region 136 [hex 88] populated whereas it's possibly empty in 1000. I'd like input from the Navigation Software Experts before proceeding further. It seems wise to firstly determine if the 1000's rgn136 has any info in it at all and it may be necessary to erase 136 in your explore when flashing hybrid fw to it. Logo bin files [region 16, hex 10] are same size but have different images.

Opinions please NSEs?