[Blackbrook Eye]

Coming from an engineering background, I hesitate to recommend this, as on the face of it, it should be a load of rubbish, however for the weight of kit you are using and the requirements you want, have a serious look at the Jobi gorrillapod, I have used one on several occasions (borrowed from a friend) and with a remote release it is surprisingly stable. If you find different results than I have then at least it's not cost a fortune to find out. If you are dissapointed, I may be persuaded to buy it from you.

Keith