GOOD NEWS. . . . The PICTURE UPLOAD FUNCTION IS WORKING !!! The tech folks at the parent company have been able to remedy the issue. You can upload pictures once again. Thank you for your patience.
When i run my tiller with a four blade, i have more bite going backwards at idle and turning ability is dramatically improved. Too much, actually. It becomes very hard to correct if you go to far too fast.
I had a 4-blade on my boat (for 24 hours, then I bent it all to ...)
I not only had great response in reverse, but the forward response, handling, and overall performance would have far outweighed any reverse issues if I would have had any.
And yes, I am buying another 4-blade this winter.