They come around all the time. Just get on their mailing list and they let you know when they come near you. I think your right about the rivets. Mine seem to smash farily easily with the 20 ton. I couldn't find the picture of the 6 ton. When I push out my barrels, the barrel is face down with the trunnion up. I could easily do it with a press that had just 6 in. to work with. When I reinstall mine, I hammer it in. If I could get 6 in. of clearance I think it is doable to remove barrel. Just depends on if you are using special jigs like Xebec's. I think the barrel is reversed with it and you would need a lot of clearance. Can't beat the price though.