Now that you've got that big aperture Dobsonian and all the accessories to go with it, does it still balance in its base? This was the problem I encountered once I attached my Telrad to the OTA. I realized that with the extra weight of the Telrad and my biggest eyepiece, the OTA wouldn't stay still if I put the telescope under 45 degrees altitude. This is a problem, but fortunately, one easily dealt with. Of course, one could just get stiffer altitude springs, or use Scope-Gripps, but that just works around the problem. I decided to actually fix it by adding a counterweight to the rear of the OTA. This is how I made my counterweight:
Disclaimer: I cannot take any responsibility for any damages, to you or to your property, occuring before, during, or after performing this telescope mod or resulting from any advice taken from this website. Do so at your own risk.