In depth A/B comparison at Acidvoice with a RE-303 from kumptronics:

http://www.acidvoice.com/re-303.htm

RE-303, DinSync and kumptronics in Keys Magazine

https://www.keys.de/magazin/heftarchiv/keys-022019/

Article on amazona.de about the RE-303 with a demo unit from kumptronics:

https://www.amazona.de/test-din-sync-re-303-die-beste-tb-303-ever/

Demo of our very first built RE-303 in alpha phase: