I can sympathize with you, having experienced the 14" Allira from Anssen Technologies which had incredibly bad optics.
Can you post intra and extra focal images of a bright star. Not only will it provide a quick assessment of collimation but it might also identify any optical defects in the system. If you do this it is absolutely essential the telescope is at thermal equilibrium.
Regards
Steven
http://users.westconnect.com.au/~sjastro/small