Colfax Marathon Taper

I ran 23.3 miles last Sunday, April 27 for my last long run before the Colorado Colfax Marathon May 18. Now it's just taper for three weeks as shown on this spreadsheet. I try and start my threshold run at my 0-10 mi marathon target heart rate 137 b/m, then 10-20 mi heart rate of 140 b/m and finish at 20-26.2 mi heart rate of 143. The first week is recovery with a 2 mi threshold run on Friday and a 4 mi threshold on Sunday. Instead of hip extensions and abductions I am going to run 4 mi easy. I'm hoping I'll get the spring back in my legs and lose some weight. I stepped on the scales this morning after breakfast and weighed 168 lb.