For a lot of years the ship had no grid lines and I was cool with that. Then I was convinced they existed and grudgingly accepted it. For the recent 1/350 model kit I think R2's intention was well meaning but they unfortunately fell short in execution although the end result is far from being disastrous. I may try to hide the lines completely and if successful I sure as hell won't bother trying to pencil them back on. I just feel the ship looks more futuristic high tech without them. For me they detract from the far future look Matt Jefferies was aiming for.