I've been using Imachinist blade from Amazon. The current blade on my saw is about a year old. After aligning the blade guides several years ago I have never had a weld break. I'm on my 3rd blade now and the only issue I have had is teeth breaking on their variable pitch 10-14 TPI. The current blade it 14 TPI and honestly it seems as sharp as it did a year ago. I wish there was a way to quantify how much steel I have cut. It not used in a business but it has cut a LOT of steel. The blade guides on these saws are not the best. They work well but they are not easy to set correctly. I had to mill the slot on the back of mine to achieve good alignment.
Mark
Mark