The ONLY ball I can think of that would be a TAD stronger than a MAXIM might be a polyester ball with a weightblock, like the Lane1 xxxl.
A MAXIM is just a regular polyester ball with a pancake weightblock and the XXXL is a polyester ball with a diamond shaped core.
Or, just MAYBE, a polyester ball with a softer cover MIGHT be just a tad stronger than the MAXIM. If you could find an older version of Columbia 300's YELLOW DOT, that might fit the bill.
As a last resort ( for something just a tad stronger than a MAXIM), you might look for a very hard, polished urethane ball designed for very little hook potential ( i.e. Grey ANGLE, polished Black HAMMER, Pink HAMMER but these are old, hard to find, and highly sought after).
By todays standards, the MAXIM isn't a dynamic ball in any way, and is considered little more than a spare ball. Not many performance balls directed at that end of the market anymore.
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"The difference between stupidity and genius is that genius has its limits."
Albert Einstein
Edited on 9/17/2009 1:56 PM