^ Thanks for the info.
I should of checked the CG for reference when it flew great. The crash was cause by a wimpy pushrod that flexed in down position. when i did a high speed dive towards the ground and suppose to snap out in a 90 degree outside turn. it didn't respond! and went round. scraped the ground hard (on asphalt, as half of the flying circle was asphalt unfortunately), cracked the plankings, stabilizer, scraped the engine, broke prop, needle valve etc.. i think the repairs made it a bit tail heavy by the looks of it.