Mate,
That's better than a mate's place I saw where an extension was done in the family area and instead of lining up the new baords with the old and staggering the joins so it blended in well they just added 100mm (yep, 10cm

) pieces right along the join area so know they look at - long board, 100mm piece staggered left by 50mm, long piece staggered back again 50mm - so in effect looking down the length of the room you look at a zig zag at that point. When I said to them they should've made it a feature and at least put in a board sideways like it looked like a perimeter feature so it seperated the two areas they just shrugged and said it didn't look that bad. If it was my place I reckon I would've got up in the middle of the night and started ripping up every last board in the whole freaking house.
You did great, don't worry about the ripple. I've sanded a floor before and honestly f*** that for a joke. You did better than me.
Cheers,
Dr - 307.