Rogers right about getting the thing perfectly balanced, never managed it myself but close enough is good enough. You definately need the weights to offset the refractor. The biggest refractor I have tried to carry is an 80mm so don't know how a bigger one would go but I always get a little nervous even with the 80. Usually use a WO ZS 66 which is super lite and only adds a little to the load. Might try slowing the motors as mine always tracks better on the climb. No doubt the pier will help settle it when I finally find time to concrete it into the ground.
Mark
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