First 3D sign help

[C&C Specialties]

We just finished running one side of our first 3D sign, and are looking for some advice. Everything turned out like we expected, but wanted to know if there was anything we could do to speed up the process. It is not overly detailed, and really not that large, but it took 16 1/2 hours. We ran a 1/4" end mill for the roughing pass, 1 1/2 hrs, at 2 ips. with a z plunge of the same. We ran a 1/8" ballnose with a 10% stepover at 5 ips. with a 3.5 ips z plunge for the finish pass, 15hrs. We are using a PRS Standard and the sign was modeled in Aspire. Is there anything that ya'll can see that would speed things up? Overall dimension is 29"x41" out of 1 1/2" signfoam 20lb.

Thanks in advance for your help.
Bob