Some time ago I began my research in gravitation. Now I am actively working in GR and quantum gravity. I am sorry to say this but when I more study it, more I think that GR is not correct after all. For some criticism to GR, you can see the last part of my "paper" on string theory sited in www.canonicalscience.com. I would aknowledge debate. I will attempt for solve your doubts, questions, etc. in this hot topic . Please note that canonical gravitodynamics (it is finally correct one) fit also with experimental data, but corrects some flaws of Einstein GR. PLease, note that contrary to usual belief in GR, the speed of gravitational interactions is not bounde by c, like a series of recent experiments proved. That and the recent LIGO failure for see gravitational waves would open our minds to posible failure of GR. Note that i am not talking about posible Planck scale correction terms to classical action. I am talking of new approach in the macroscopic, classical regime.