Transcendent Sound Grounded Grid Preamp upgrade


I've a Transcendent Sound Grounded Grid Preamp which sounds decent, but no match for a friend's Manley Jumbo Shrimp loaned me. I understand the price difference. Has anyone tube rolled this preamp with significant improvements?
I'm running an Audio Quest AC2 power cord.

It sounds congested and not as dynamic as I had hoped. Suggestions other than buy a Manley jumbo Shrimp are appreciated. Thanks.
celtic66
A component like this is built to a certain targeted price point. As a result, the cost of parts have to be closely watched. As has been mentioned above by Dan I believe higher-quality coupling capacitors would result in much bang for the buck. Get the best caps you can afford, coupling caps do matter greatly. Good luck.
I’m in the process of stripping down my pinnacles they are IMHO A FLAWED DESIGN