@jerryg123 - why would you think to buy a new unit when there are plenty of used ones on the market. Yeah not the same as just putting a motor in another car. My company manufacturers reference audio components and we have been repairing/upgrading/modifying them for 20+ years now. While parts can be a solution, we can also modify the circuits for improved sound quality.
If the OP is looking for the same old thing, so be it. If he wants something special then that is another story. He could buy one of our DACs but we are a little higher priced than $7K.
As far as "some tweaks and unsubstantiated claims" well then you don't have a clue who I am or anything about my company. We do not advertise or look for reviews simply because we are in a different market then people here on this site. What I offer is a way to improve sound for not much cost.
You can read a review by another Agon member who has gotten to know us and who is learning about sound by searching this:
VU JÀDÉ AUDIO Lampizator Upgrades
I am not here to promote our products but I am offering assistance in helping others achieve the best sound possible who don't have the money to afford something better. I offer repairs and upgrades at reasonable costs to anyone interested. I also offer everyone the opportunity to come to our Listening Room in New Jersey any time to listen, learn and enjoy.
Happy Listening.