KJ, the IM rod and the series one rod are different blanks the im rods loomis use to make which were the original IM1141 which I stiil have a few were bought from the same manufacturer their was a big battle at loomis about the price they were paying for the blanks versus berkely's price cut,where the manufacturer informed loomis if they bought 200,000 blanks like berkely they would get a price break also. I absolutely agree any berkely rod is not comparable to the loomis rods but I also find that those berkelys come in hand also. Berkeley use to make a IM6 rod that was absolutely the most sensitive rod I have ever owned and would die to still have one but like every thing else its a supply and demand scenerio and got discontinued!!!