None to my knowledge anyway. If after all that you had done to it and the sound is still not to your likeing I'm afraid thats about all you can do to an all laminate acoustic guitar,but you might want to ask Stephen White the online guitar tech here at GT and see if he has any suggestions.

The good news is there are a lot of high end guitar makers making solid top units in their Asian and Mexican outlets that are good quality and can be had for a resonable price. Breedlove, Ibanez, Alvarez and Yamaha to name a few. Even Martin and Taylor have some good low cost solid top options now.

Of course if you can up your budget then all solid wood is the way to go.

Good Luck with your decision.

Moe