Been a while since posting and felt like I needed to get up to date, and thanks all for the continued interest - and yes Carl, Mobbsie, simply making slightly wider transoms is the solution.  Rather tedious which is why my fingers have been distracted as you'll see.   I feel like I should start with a "forgive me father its been 700 days since I've looked at the instructions or used a kit part"    Haven't been completely idle but have got a decent start on couple of visually small but