Ya, plan to redrill the hole tomorrow when I get the correct size saw. Duh! Why didn't I double check? Now I got three times the work. Grr.
Oh well meanstwhile, not to be discouraged, I eliminated the aft straps on the bimini by adding a pair of stiff bars. Much easier to access'n egress without the straps.
To be honest the boat probly wouldn't have a top on it yet if I hadn't screwed up'n ordered (4) 7/8" rail mounts for a job that required 1" ... 40$ mistake. Duh again.
Barring any more effups hope to have the tach installed tomorrow eve.