Are the blanks from the same company? May be a casting issue. Also, is it defo a profile for solid lifrters with the correct ramp angle?

If i were u, id get a std cam and follwoers - i can get em for 80 quid. They seem to last very well. Put one in ur engine, and run it for 500 miles, and inspect the wear. If it's not worn, u know that u have no problems with oil supply.