Never heard or read of this cannon pack for the Hs 123
Only 2 x 7,92mm MG 17, 4 x 50kg SC 50 and 1 x 250kg SC 250.
Later at the Eastern Front two 20mm underwing MG FF could be applied through field conversions.
Btw, at the very moment I´m busy with polishing up the SAW Hs 123.
After finishing that I could apply LG 2 Dunkirk markings (interestingly still the pre-war RLM 61/62/63/65 combination)