OK, I'll try moving the seat back and see if it improves, I have to admit I'm not convinced it's going to help. My MNT bike has a 23" TT and an off set seat post, as I wrote above, it's stretched out, I still get the numbness on that.

Next 2 days are supposed to rain here, depending on how bad is when I'm going to get to bike commute again. I'll update this.