I am on vacation this week so Tuesday I went to the shooting range. I had my sidekick. I had altered the breech plug by drilling it out slightly as advised because it was impossible to get thr primers out. Anyway I reduced my load from 100 grains o floos triple 7 to 85 grains of loose 777. The first shot was awesome. I swabbed with windex and reloaded When I shot I had a ton of blowback. I took th egun apart cleaned the plug and the gun and changed the oring. Te reults were the same with the extreme blowback. When I got home I sent Nick an email and explained what happened. I got an instant mail back saying he was puzzled and was sending out a new plug right away. I offered to send the other back so he could look at it which he agreed to. Well today I got an email from him saying he got my plug and it had burrs inside the area that I took some stock off so the oring could not seal. So the problem was created by me. I offered to send the shipping costs to Nick for his inconvenience and cost for covering my mistake which he declined. All I can say is customer service like that is a rarity in this day and age especially when it was not even anything he did, it was what I did. If I need this one reamed, I will have a machinist friend of mine do it, so I do not screw up another. Nick thank you very much for all you have done. I give you 5 thumbs up and will recommend your breech plug to everyone I know who owns a huntsman or sidekick as it is the best thing going. Thank you again.