I think the reverb in the A4 is pretty awesome and definitely lends it self to drony stuff. Regarding the quality I’d say it’s pretty close to Strymon stuff just without the different algos like shimmer and so on.

Creating drones just by maxing out reverb settings gets old pretty fast though. The A4 is great at making interesting pulsing ambiences of all kinds without too much reverb.

But if the Folktek stuff is exactly what you’re heading for I’d say just feed whatever noise bursts into any shimmer reverb. Reaktor has some nice shimmer reverbs. But maybe you’d be even better off using some physical modelling software for a source sound instead of A4 to create the metallic cling clang.