Is the hole spacing on the Keepers and Yakima footbraces the same? And, does anyone have the exact center to center measurements for them? I'm going to need to order whichever one I decide upon, but I'd like to get the t-nutted blocks glued into the cockpit soon, probably before they show up. Also, it looks like Sealline has adjustable footbraces available without the "toe pilot" rudder feature, but thet're running $50 from REI (link below). Am I missing something, or is there a feature that'll make then worth the $20-$30 upcharge over Keepers or Yakimas?