No question they are good barrels. Depends on where the cost savings is, because I consider $135 for a fitted barrel at is threaded, a pretty good deal: http://www.airguns.net/classifieds/show_ad.php?adNum=128668&adSort=&StartingAd=0&NumberOfPages=6Roy does nice work, and for me, I couldnt do that myself like you can. I think its a great idea and quite feasible, also given that there are tubes already available as well.