Lopsided triangle have a real negative impact on the finished rod. It promotes twist and impacts straightness. It can result in glue lines and missed dimensions so slow down when planing, measure the strips repeatedly and get your triangles bang on. A good practice is to set your forms .010-.015" oversize and with a new blade finish your planing with an eye to fixing the triangle if they are lopsided. .001-.002 variance is fine so don't get too carried away. As you improve your strips you will get more consistency in your rods. This new found consistency is NOT the hobgoblin of little minds.