The Roland Space Echo in any form is a good machine it's own capabilities, but does not have the correct head positioning for the Shadows sounds. Hank made do with it because there were not too many multi-head machines around from the seventies onwards until now. I can relate to Pauls 'What was he thinking' statement.
Paul's TVS3 is the one that ticks all the boxes if you want perfection but as we all know isn't cheap.
I still get excellent results from the Strymon Volante, it can do all the correct taps and timings that you need for the Hank echoes, plus it has vari-speed as well as being able to add tape saturation and wear. As far as pedals go the Volante is the best I have tried by far and I have tried a lot before eventually going back to the TVS3. Second to the TVS3 for me is the Atlantis 1 machine which needs to be set up as an 'old school' machine (no programmed patches) but is excellent if you can find one.
I made patches for the cheap and cheerful Zoom G3 - G5 etc but they don't possess the tone.
As many of you will have read over the past couple of years, I have a Meazzi Echomatic and it does have the sound but I find it a pain in the butt because it's temperamental, so it sits in my studio and is used for reference and serves the purpose of helping me tune in my Kemper Profiler to copy the echoes and timbres of the echo tone.
My chosen rig for Shadows style gigs is my TVS3/Vox AC30/4 but everything else the Kemper through my Fender Deluxe Reverb which is set flat as a powered speaker, or an actual FRFR speaker. I really have stopped worrying about finding the sound because I now have it in those options. All my gadgets such as EQ pedals and Ariab / Gemini3 / JHS Colourbox / are now meaningless because the sound is in my rigs. It took a lot of testing and spending money to do it, but I had fun and enjoyed the journey.