Lenovo M720Q bios modding, tool questions

[splynncryth]

I have a Lenovo M720Q that I'm trying to do some modding work on (primarally just unlocking all the questions in the forms). I've used a CH341A to make an image of the BIOS flash part. It's a dscriptor mode image  so I used UEFITool to extract the BIOS region. The BIOS itself is based on Aptio.
I have tried using AMIBCP 5.02.0031 on both the BIOS region but I get a message that the image is not Aptio V (but it's Aptio and I don't think there have been any Aptio 4 BIOSes for anything released in the last decade). 
Just to see what would happen, I tried using BCP on the raw image. I also tried MMTool version 5.02.0025 on both the BIOS region and the whole flash image. All these attempts failed with the same result. 

I saw an older thread from a couple years ago on the win-raid forums where someone got AMIBCP working but the person who managed it is inactive on those forums. 

Could anyone here clue me in to the trick? Is there a better tool for splitting up a descriptor mode image? I see AMI BCP has an option to open .fv files which sounds like another option may be extracting the right firmware volume and giving that a shot. Is that a viable path? Does anyone know the correct GUID for that firmware volume. 

Full discolure, I have experience in BIOS development but it's been a little over a decade since I have done anything BIOS related. But all the basics of UEFI look to be the same as when I left the industry.