Finally finished
I ended up makiing a 2 piece base. The lower base contains an eyepiece drawer and does not rotate. It can be used under the conventional dob base to raise the eyepiece height for use standing or it can be removed and used as a stool for seated observing, or as a stand for small children.
The attached images show the scope in high and low configurations and the tube interior before and after flocking.
Cheers,