Can anyone please tell me how the calculated results from the link below
might be wrong (if at all)? .... It relates to the Hubble Constant & CMBR
Temperature.

I'd like someone to tell me, not just that they're wrong if they are, but
why they're wrong & how it is that the approach achieves such precise
experimentally validated results.

http://www.deltagroupengineering.com/Docs/Cosmos.pdf

Cheers