You might be right on that. I dont see the length of the handle listed for the composit heavy log splitter however they only offer a 31.5" composit replacement handle...Ah.....that makes total sense about the shoulder.
The poly handle is only 32" I believe. I spent a lot of time rooting through their website.
I believe the next splitting tool I buy is going to be a heavier maul though, not another splitting axe. Have you tried their Top Line product? The Heavy Splitter has a 6.2 lb head weight and the Heavy Splitting Maul has a 7.7lb head weight.