My advice, if you have been offered a TVS3 and you are serious about wanting the exact sound of those Shadows records - BUY IT !
The TVS3 has the echoes programmed by title of the track on many of them. There are knobs to increase echo volume and feedback, should you feel the need.
Personally I think Paul has got it pretty well right. He has listened and taken the uncertainty away, all you need to do is select a patch and play.
I'm sure Paul can explain it all better than I can and I think he'd be delighted to help you.
The difference between the H&C and the TVS3 is subtle but the TVS3 nails the tone, where the H&C needs something to make it sound 'right'.
I've mentioned it before. I call it 'fine margins' but to me those fine margins matter. I wasn't convinced until I bought my own Meazzi at the beginning of February and when it arrived and I fired it up, a whole new chapter of my working life began. The Meazzi in the chain without using the actual echo makes any echo pedal sound 'right', it's that pre-amp.