If that picture is correct BTW, that base would be wobbly as .
The main criteria to building a strong, stiff dob is:
1. Use good quality plywood.
2. Keep the rocker as short and stubby as possible.
This scope does neither.
But my view is a subjective one. I have owned the 12" GSO, and didnt really think much of the rocker that comes with it. Way too wobbly and made from cheap chipboard. However another owner of the same scope may not have any issues with it at all.
Speaking of which, my 16" project is almost finished. The finish is almost dry, and it will be time for final assembly this weekend. So get ready for some bad weather near Adelaide!!