MK 108 30mm auto cannon question

Would you happen to have a photo of what you are referring to on your kit? That might be helpful for folks not familair with the Eduard kit, but who know the FW-190.

https://hobbyworld-usa.com/index.php?id_product=5117&rewrite=master-german-aircraft-machine-gun-mk-108-30mm-barrels-blast-tubes-2pcs-009&controller=product&id_lang=1 

these MK 108 (30mm)  replaced the outboard MG151 20mm cannon -- photos seem to indicate the 'blast tube' was widely used -  just want to see if anyone has more info about them-

Thanks 

Looks like they were used... just cant say how commonly

Thanks Stik - yes , Im using that photo as my main reference-- had to do a bit of surgery to get the barrels into the wing mounts -- appreciate your help

Dog