Changes in base cost in Tower Plant

Hi,I have some questions about the "system cost" section in the Tower Solar Power Plant module. I understand that SAM includes some first values (costs) which are someone's reasonable as a first rough guess, right?If it is that so, I wonder about the big difference in cost in Heliostate field cost (145 and 140 $/m2 in the previous 2017.1.17 and 2018.11.11 versions, and 70 $/m2 in the current 2020.2.29 version); Tower cost fixed (3MM$ in the previous versions, but 8 MM$ in the current 2020.2.29 version), Receiver reference cost (103 MM$ in the previous versions, but 10 MM$ in the current 2020.2.29 version), and in the Thermal energy storage cost (24 and 22 in the two already mentioned previous versions but 80 $/kWh-t in the current one).Do you have any referenced documents about these changes? (more updated than sam.nrel.gov/concentrating-solar-power/csp-cost-data , since the last document there is from 2015).
Regards,

Dear Matias,

The default costs for CSP systems in SAM 2020.2.29 need to be revised back to the SAM 2018.11.11 values. We will do that in the next update. For now, please use the default costs from SAM 2018.11.11 as a reference.

Best regards,
Paul.